Use fixed versions for dev dependencies

Author: leo

package.json

@@ -2,20 +2,17 @@
   "name": "ms",
   "version": "0.7.1",
   "description": "Tiny ms conversion utility",
-  "repository": {
-    "type": "git",
-    "url": "git://github.com/guille/ms.js.git"
-  },
+  "repository": "zeit/ms",
   "main": "./index",
+  "license": "MIT",
   "devDependencies": {
-    "mocha": "*",
-    "expect.js": "*",
-    "serve": "*"
+    "mocha": "^3.0.2",
+    "expect.js": "^0.3.1",
+    "serve": "^1.4.0"
   },
   "component": {
     "scripts": {
       "ms/index.js": "index.js"
     }
-  },
-  "license": "MIT"
+  }
 }