chore(package): update assert to version 1.4.1 (#20)

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -27,7 +27,7 @@
     "@cycle/rx-adapter": "^1.0.3",
     "@cycle/rxjs-adapter": "^1.0.5",
     "@cycle/xstream-adapter": "^1.0.3",
-    "assert": "^1.3.0",
+    "assert": "^1.4.1",
     "babel-preset-es2015": "^6.6.0",
     "babel-register": "^6.7.2",
     "babelify": "^7.2.0",