diff --git a/Pipfile.lock b/Pipfile.lock
index 3ac6724..ccfb818 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -38,55 +38,18 @@
         },
         "bleach": {
             "hashes": [
-                "sha256:0ee95f6167129859c5dce9b1ca291ebdb5d8cd7e382ca0e237dfd0dad63f63d8",
-                "sha256:24754b9a7d530bf30ce7cbc805bc6cce785660b4a10ff3a43633728438c105ab"
+                "sha256:2ffa40dfa80b141ff58eee538bce0d2a09c7d456018d00f7a2cb0ebf967c524d",
+                "sha256:f0b1ee0315062e60afa6b7cc39b1c3718b591e1d552a8841044dc49a68465659"
             ],
-            "version": "==2.1.4"
+            "index": "pypi",
+            "version": "==3.1.2"
         },
         "certifi": {
             "hashes": [
-                "sha256:376690d6f16d32f9d1fe8932551d80b23e9d393a8578c5633a2ed39a64861638",
-                "sha256:456048c7e371c089d0a77a5212fb37a2c2dce1e24146e3b7e0261736aaeaa22a"
+                "sha256:017c25db2a153ce562900032d5bc68e9f191e44e9a0f762f373977de9df1fbb3",
+                "sha256:25b64c7da4cd7479594d035c08c2d809eb4aab3a26e5a990ea98cc450c320f1f"
             ],
-            "version": "==2018.8.24"
-        },
-        "cffi": {
-            "hashes": [
-                "sha256:151b7eefd035c56b2b2e1eb9963c90c6302dc15fbd8c1c0a83a163ff2c7d7743",
-                "sha256:1553d1e99f035ace1c0544050622b7bc963374a00c467edafac50ad7bd276aef",
-                "sha256:1b0493c091a1898f1136e3f4f991a784437fac3673780ff9de3bcf46c80b6b50",
-                "sha256:2ba8a45822b7aee805ab49abfe7eec16b90587f7f26df20c71dd89e45a97076f",
-                "sha256:3bb6bd7266598f318063e584378b8e27c67de998a43362e8fce664c54ee52d30",
-                "sha256:3c85641778460581c42924384f5e68076d724ceac0f267d66c757f7535069c93",
-                "sha256:3eb6434197633b7748cea30bf0ba9f66727cdce45117a712b29a443943733257",
-                "sha256:495c5c2d43bf6cebe0178eb3e88f9c4aa48d8934aa6e3cddb865c058da76756b",
-                "sha256:4c91af6e967c2015729d3e69c2e51d92f9898c330d6a851bf8f121236f3defd3",
-                "sha256:57b2533356cb2d8fac1555815929f7f5f14d68ac77b085d2326b571310f34f6e",
-                "sha256:770f3782b31f50b68627e22f91cb182c48c47c02eb405fd689472aa7b7aa16dc",
-                "sha256:79f9b6f7c46ae1f8ded75f68cf8ad50e5729ed4d590c74840471fc2823457d04",
-                "sha256:7a33145e04d44ce95bcd71e522b478d282ad0eafaf34fe1ec5bbd73e662f22b6",
-                "sha256:857959354ae3a6fa3da6651b966d13b0a8bed6bbc87a0de7b38a549db1d2a359",
-                "sha256:87f37fe5130574ff76c17cab61e7d2538a16f843bb7bca8ebbc4b12de3078596",
-                "sha256:95d5251e4b5ca00061f9d9f3d6fe537247e145a8524ae9fd30a2f8fbce993b5b",
-                "sha256:9d1d3e63a4afdc29bd76ce6aa9d58c771cd1599fbba8cf5057e7860b203710dd",
-                "sha256:a36c5c154f9d42ec176e6e620cb0dd275744aa1d804786a71ac37dc3661a5e95",
-                "sha256:a6a5cb8809091ec9ac03edde9304b3ad82ad4466333432b16d78ef40e0cce0d5",
-                "sha256:ae5e35a2c189d397b91034642cb0eab0e346f776ec2eb44a49a459e6615d6e2e",
-                "sha256:b0f7d4a3df8f06cf49f9f121bead236e328074de6449866515cea4907bbc63d6",
-                "sha256:b75110fb114fa366b29a027d0c9be3709579602ae111ff61674d28c93606acca",
-                "sha256:ba5e697569f84b13640c9e193170e89c13c6244c24400fc57e88724ef610cd31",
-                "sha256:be2a9b390f77fd7676d80bc3cdc4f8edb940d8c198ed2d8c0be1319018c778e1",
-                "sha256:ca1bd81f40adc59011f58159e4aa6445fc585a32bb8ac9badf7a2c1aa23822f2",
-                "sha256:d5d8555d9bfc3f02385c1c37e9f998e2011f0db4f90e250e5bc0c0a85a813085",
-                "sha256:e55e22ac0a30023426564b1059b035973ec82186ddddbac867078435801c7801",
-                "sha256:e90f17980e6ab0f3c2f3730e56d1fe9bcba1891eeea58966e89d352492cc74f4",
-                "sha256:ecbb7b01409e9b782df5ded849c178a0aa7c906cf8c5a67368047daab282b184",
-                "sha256:ed01918d545a38998bfa5902c7c00e0fee90e957ce036a4000a88e3fe2264917",
-                "sha256:edabd457cd23a02965166026fd9bfd196f4324fe6032e866d0f3bd0301cd486f",
-                "sha256:fdf1c1dc5bafc32bc5d08b054f94d659422b05aba244d6be4ddc1c72d9aa70fb"
-            ],
-            "markers": "python_version != '3.1.*' and python_version != '3.2.*' and python_version >= '2.7' and python_version != '3.0.*' and python_version != '3.3.*'",
-            "version": "==1.11.5"
+            "version": "==2019.11.28"
         },
         "chardet": {
             "hashes": [
@@ -95,40 +58,6 @@
             ],
             "version": "==3.0.4"
         },
-        "cmarkgfm": {
-            "hashes": [
-                "sha256:0186dccca79483e3405217993b83b914ba4559fe9a8396efc4eea56561b74061",
-                "sha256:1a625afc6f62da428df96ec325dc30866cc5781520cbd904ff4ec44cf018171c",
-                "sha256:207b7673ff4e177374c572feeae0e4ef33be620ec9171c08fd22e2b796e03e3d",
-                "sha256:275905bb371a99285c74931700db3f0c078e7603bed383e8cf1a09f3ee05a3de",
-                "sha256:50098f1c4950722521f0671e54139e0edc1837d63c990cf0f3d2c49607bb51a2",
-                "sha256:50ed116d0b60a07df0dc7b180c28569064b9d37d1578d4c9021cff04d725cb63",
-                "sha256:61a72def110eed903cd1848245897bcb80d295cd9d13944d4f9f30cba5b76655",
-                "sha256:64186fb75d973a06df0e6ea12879533b71f6e7ba1ab01ffee7fc3e7534758889",
-                "sha256:665303d34d7f14f10d7b0651082f25ebf7107f29ef3d699490cac16cdc0fc8ce",
-                "sha256:70b18f843aec58e4e64aadce48a897fe7c50426718b7753aaee399e72df64190",
-                "sha256:761ee7b04d1caee2931344ac6bfebf37102ffb203b136b676b0a71a3f0ea3c87",
-                "sha256:811527e9b7280b136734ed6cb6845e5fbccaeaa132ddf45f0246cbe544016957",
-                "sha256:987b0e157f70c72a84f3c2f9ef2d7ab0f26c08f2bf326c12c087ff9eebcb3ff5",
-                "sha256:9fc6a2183d0a9b0974ec7cdcdad42bd78a3be674cc3e65f87dd694419b3b0ab7",
-                "sha256:a3d17ee4ae739fe16f7501a52255c2e287ac817cfd88565b9859f70520afffea",
-                "sha256:ba5b5488719c0f2ced0aa1986376f7baff1a1653a8eb5fdfcf3f84c7ce46ef8d",
-                "sha256:c573ea89dd95d41b6d8cf36799c34b6d5b1eac4aed0212dee0f0a11fb7b01e8f",
-                "sha256:c5f1b9e8592d2c448c44e6bc0d91224b16ea5f8293908b1561de1f6d2d0658b1",
-                "sha256:cbe581456357d8f0674d6a590b1aaf46c11d01dd0a23af147a51a798c3818034",
-                "sha256:cf219bec69e601fe27e3974b7307d2f06082ab385d42752738ad2eb630a47d65",
-                "sha256:cf5014eb214d814a83a7a47407272d5db10b719dbeaf4d3cfe5969309d0fcf4b",
-                "sha256:d08bad67fa18f7e8ff738c090628ee0cbf0505d74a991c848d6d04abfe67b697",
-                "sha256:d6f716d7b1182bf35862b5065112f933f43dd1aa4f8097c9bcfb246f71528a34",
-                "sha256:e08e479102627641c7cb4ece421c6ed4124820b1758765db32201136762282d9",
-                "sha256:e20ac21418af0298437d29599f7851915497ce9f2866bc8e86b084d8911ee061",
-                "sha256:e25f53c37e319241b9a412382140dffac98ca756ba8f360ac7ab5e30cad9670a",
-                "sha256:e8932bddf159064f04e946fbb64693753488de21586f20e840b3be51745c8c09",
-                "sha256:f20900f16377f2109783ae9348d34bc80530808439591c3d3df73d5c7ef1a00c"
-            ],
-            "markers": "python_version != '3.1.*' and python_version != '3.2.*' and python_version >= '2.7' and python_version != '3.0.*' and python_version != '3.3.*'",
-            "version": "==0.4.2"
-        },
         "collective.checkdocs": {
             "hashes": [
                 "sha256:3a5328257c5224bc72753820c182910d7fb336bc1dba5e09113d48566655e46e"
@@ -138,38 +67,24 @@
         },
         "decorator": {
             "hashes": [
-                "sha256:2c51dff8ef3c447388fe5e4453d24a2bf128d3a4c32af3fabef1f01c6851ab82",
-                "sha256:c39efa13fbdeb4506c476c9b3babf6a718da943dab7811c206005a4a956c080c"
+                "sha256:41fa54c2a0cc4ba648be4fd43cff00aedf5b9465c9bf18d64325bc225f08f760",
+                "sha256:e3a62f0520172440ca0dcc823749319382e377f37f140a0b99ef45fecb84bfe7"
             ],
-            "version": "==4.3.0"
+            "version": "==4.4.2"
         },
         "docutils": {
             "hashes": [
-                "sha256:02aec4bd92ab067f6ff27a38a38a41173bf01bed8f89157768c1573f53e474a6",
-                "sha256:51e64ef2ebfb29cae1faa133b3710143496eca21c530f3f71424d77687764274",
-                "sha256:7a4bd47eaf6596e1295ecb11361139febe29b084a87bf005bf899f9a42edc3c6"
-            ],
-            "version": "==0.14"
-        },
-        "future": {
-            "hashes": [
-                "sha256:e39ced1ab767b5936646cedba8bcce582398233d6a627067d4c6a454c90cfedb"
-            ],
-            "version": "==0.16.0"
-        },
-        "html5lib": {
-            "hashes": [
-                "sha256:20b159aa3badc9d5ee8f5c647e5efd02ed2a66ab8d354930bd9ff139fc1dc0a3",
-                "sha256:66cb0dcfdbbc4f9c3ba1a63fdb511ffdbd4f513b2b6d81b80cd26ce6b3fb3736"
+                "sha256:0c5b78adfbf7762415433f5515cd5c9e762339e23369dbe8000d84a4bf4ab3af",
+                "sha256:c2de3a60e9e7d07be26b7f2b00ca0309c207e06c100f9cc2a94931fc75a478fc"
             ],
-            "version": "==1.0.1"
+            "version": "==0.16"
         },
         "idna": {
             "hashes": [
-                "sha256:156a6814fb5ac1fc6850fb002e0852d56c0c8d2531923a51032d1b70760e186e",
-                "sha256:684a38a6f903c1d71d6d5fac066b58d7768af4de2b832e426ec79c30daa94a16"
+                "sha256:7588d1c14ae4c77d74036e8c22ff447b26d0fde8f007354fd48a7814db15b7cb",
+                "sha256:a068a21ceac8a4d63dbfd964670474107f541babbd2250d61922f029858365fa"
             ],
-            "version": "==2.7"
+            "version": "==2.9"
         },
         "ipython": {
             "hashes": [
@@ -188,25 +103,25 @@
         },
         "jedi": {
             "hashes": [
-                "sha256:0ad328f5d9d0a6c8b22a0ca429c7b0cea1974e2b2d5a00e0bc45074dcd44d255",
-                "sha256:e4db7a2e08980e48c6aec6588483629c81fdcf9b6d9e6a372b40ed7fec91f310"
+                "sha256:b4f4052551025c6b0b0b193b29a6ff7bdb74c52450631206c262aef9f7159ad2",
+                "sha256:d5c871cb9360b414f981e7072c52c33258d598305280fef91c6cae34739d65d5"
             ],
-            "version": "==0.13.0"
+            "version": "==0.16.0"
         },
         "parso": {
             "hashes": [
-                "sha256:35704a43a3c113cce4de228ddb39aab374b8004f4f2407d070b6a2ca784ce8a2",
-                "sha256:895c63e93b94ac1e1690f5fdd40b65f07c8171e3e53cbd7793b5b96c0e0a7f24"
+                "sha256:0c5659e0c6eba20636f99a04f469798dca8da279645ce5c387315b2c23912157",
+                "sha256:8515fc12cfca6ee3aa59138741fc5624d62340c97e401c74875769948d4f2995"
             ],
-            "version": "==0.3.1"
+            "version": "==0.6.2"
         },
         "pexpect": {
             "hashes": [
-                "sha256:2a8e88259839571d1251d278476f3eec5db26deb73a70be5ed5dc5435e418aba",
-                "sha256:3fbd41d4caf27fa4a377bfd16fef87271099463e6fa73e92a52f92dfee5d425b"
+                "sha256:0b48a55dcb3c05f3329815901ea4fc1537514d6ba867a152b581d69ae3710937",
+                "sha256:fc65a43959d153d0114afe13997d439c22823a27cefceb5ff35c2178c6784c0c"
             ],
             "markers": "sys_platform != 'win32'",
-            "version": "==4.6.0"
+            "version": "==4.8.0"
         },
         "pickleshare": {
             "hashes": [
@@ -217,18 +132,18 @@
         },
         "pkginfo": {
             "hashes": [
-                "sha256:5878d542a4b3f237e359926384f1dde4e099c9f5525d236b1840cf704fa8d474",
-                "sha256:a39076cb3eb34c333a0dd390b568e9e1e881c7bf2cc0aee12120636816f55aee"
+                "sha256:7424f2c8511c186cd5424bbf31045b77435b37a8d604990b79d4e70d741148bb",
+                "sha256:a6d9e40ca61ad3ebd0b72fbadd4fba16e4c0e4df0428c041e01e06eb6ee71f32"
             ],
-            "version": "==1.4.2"
+            "version": "==1.5.0.1"
         },
         "prompt-toolkit": {
             "hashes": [
-                "sha256:5eff0c9fd652384ecfe730bbcdf3658868725c6928fbf608d9338834d7a974b6",
-                "sha256:81da9ecf6ca6806a549697529af8ec3ac5b739c13ac14607218e650db1b53131",
-                "sha256:c67c1c264d8a0d9e1070e9272bacee00f76c81daab7bc4bf09ff991bd1e224a7"
+                "sha256:46642344ce457641f28fc9d1c9ca939b63dadf8df128b86f1b9860e59c73a5e4",
+                "sha256:e7f8af9e3d70f514373bf41aa51bc33af12a6db3f71461ea47fea985defb2c31",
+                "sha256:f15af68f66e664eaa559d4ac8a928111eebd5feda0c11738b5998045224829db"
             ],
-            "version": "==2.0.5"
+            "version": "==2.0.10"
         },
         "ptyprocess": {
             "hashes": [
@@ -237,40 +152,33 @@
             ],
             "version": "==0.6.0"
         },
-        "pycparser": {
-            "hashes": [
-                "sha256:a988718abfad80b6b157acce7bf130a30876d27603738ac39f140993246b25b3"
-            ],
-            "markers": "python_version != '3.1.*' and python_version != '3.2.*' and python_version >= '2.7' and python_version != '3.0.*' and python_version != '3.3.*'",
-            "version": "==2.19"
-        },
         "pygments": {
             "hashes": [
-                "sha256:78f3f434bcc5d6ee09020f92ba487f95ba50f1e3ef83ae96b9d5ffa1bab25c5d",
-                "sha256:dbae1046def0efb574852fab9e90209b23f556367b5a320c0bcb871c77c3e8cc"
+                "sha256:647344a061c249a3b74e230c739f434d7ea4d8b1d5f3721bc0f3558049b38f44",
+                "sha256:ff7a40b4860b727ab48fad6360eb351cc1b33cbf9b15a0f689ca5353e9463324"
             ],
-            "version": "==2.2.0"
+            "version": "==2.6.1"
         },
         "readme-renderer": {
             "hashes": [
-                "sha256:237ca8705ffea849870de41101dba41543561da05c0ae45b2f1c547efa9843d2",
-                "sha256:f75049a3a7afa57165551e030dd8f9882ebf688b9600535a3f7e23596651875d"
+                "sha256:1b6d8dd1673a0b293766b4106af766b6eff3654605f9c4f239e65de6076bc222",
+                "sha256:e67d64242f0174a63c3b727801a2fff4c1f38ebe5d71d95ff7ece081945a6cd4"
             ],
-            "version": "==22.0"
+            "version": "==25.0"
         },
         "requests": {
             "hashes": [
-                "sha256:63b52e3c866428a224f97cab011de738c36aec0185aa91cfacd418b5d58911d1",
-                "sha256:ec22d826a36ed72a7358ff3fe56cbd4ba69dd7a6718ffd450ff0e9df7a47ce6a"
+                "sha256:43999036bfa82904b6af1d99e4882b560e5e2c68e5c4b0aa03b655f3d7d73fee",
+                "sha256:b3f43d496c6daba4493e7c431722aeb7dbc6288f52a6e04e7b6023b0247817e6"
             ],
-            "version": "==2.19.1"
+            "version": "==2.23.0"
         },
         "requests-toolbelt": {
             "hashes": [
-                "sha256:42c9c170abc2cacb78b8ab23ac957945c7716249206f90874651971a4acff237",
-                "sha256:f6a531936c6fa4c6cfce1b9c10d5c4f498d16528d2a54a22ca00011205a187b5"
+                "sha256:380606e1d10dc85c3bd47bf5a6095f815ec007be7a8b69c878507068df059e6f",
+                "sha256:968089d4584ad4ad7c171454f0a5c6dac23971e9472521ea3b6d49d610aa6fc0"
             ],
-            "version": "==0.8.0"
+            "version": "==0.9.1"
         },
         "simplegeneric": {
             "hashes": [
@@ -280,25 +188,24 @@
         },
         "six": {
             "hashes": [
-                "sha256:70e8a77beed4562e7f14fe23a786b54f6296e34344c23bc42f07b15018ff98e9",
-                "sha256:832dc0e10feb1aa2c68dcc57dbb658f1c7e65b9b61af69048abc87a2db00a0eb"
+                "sha256:236bdbdce46e6e6a3d61a337c0f8b763ca1e8717c03b369e87a7ec7ce1319c0a",
+                "sha256:8f3cd2e254d8f793e7f3d6d9df77b92252b52637291d0f0da013c76ea2724b6c"
             ],
-            "version": "==1.11.0"
+            "version": "==1.14.0"
         },
         "tqdm": {
             "hashes": [
-                "sha256:18f1818ce951aeb9ea162ae1098b43f583f7d057b34d706f66939353d1208889",
-                "sha256:df02c0650160986bac0218bb07952245fc6960d23654648b5d5526ad5a4128c9"
+                "sha256:0d8b5afb66e23d80433102e9bd8b5c8b65d34c2a2255b2de58d97bd2ea8170fd",
+                "sha256:f35fb121bafa030bd94e74fcfd44f3c2830039a2ddef7fc87ef1c2d205237b24"
             ],
-            "markers": "python_version != '3.1.*' and python_version != '3.0.*' and python_version >= '2.6'",
-            "version": "==4.26.0"
+            "version": "==4.43.0"
         },
         "traitlets": {
             "hashes": [
-                "sha256:9c4bd2d267b7153df9152698efb1050a5d84982d3384a37b2c1f7723ba3e7835",
-                "sha256:c6cb5e6f57c5a9bdaa40fa71ce7b4af30298fbab9ece9815b5d995ab6217c7d9"
+                "sha256:70b4c6a1d9019d7b4f6846832288f86998aa3b9207c6821f3578a6a6a467fe44",
+                "sha256:d023ee369ddd2763310e4c3eae1ff649689440d4ae59d7485eb4cfbbe3e359f7"
             ],
-            "version": "==4.3.2"
+            "version": "==4.3.3"
         },
         "twine": {
             "hashes": [
@@ -310,18 +217,17 @@
         },
         "urllib3": {
             "hashes": [
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-                "sha256:b5725a0bd4ba422ab0e66e89e030c806576753ea3ee08554382c14e685d117b5"
+                "sha256:2f3db8b19923a873b3e5256dc9c2dedfa883e33d87c690d9c7913e1f40673cdc",
+                "sha256:87716c2d2a7121198ebcb7ce7cccf6ce5e9ba539041cfbaeecfb641dc0bf6acc"
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-            "version": "==1.23"
+            "version": "==1.25.8"
         },
         "wcwidth": {
             "hashes": [
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-                "sha256:f4ebe71925af7b40a864553f761ed559b43544f8f71746c2d756c7fe788ade7c"
+                "sha256:cafe2186b3c009a04067022ce1dcd79cb38d8d65ee4f4791b8888d6599d1bbe1",
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             ],
-            "version": "==0.1.7"
+            "version": "==0.1.9"
         },
         "webencodings": {
             "hashes": [