Switch from yargs to minimist

For our simple usecase we do not need the extra functionality of yargs.
This removes 4 dependencies from our dependency graph.

https://github.com/bcoe/yargs
https://github.com/substack/minimist

package.json

@@ -51,9 +51,9 @@
     "jshint-stylish": "^1.0.1",
     "lazypipe": "^0.2.2",
     "merge-stream": "^0.1.7",
+    "minimist": "^1.1.1",
     "run-sequence": "^1.0.2",
     "traverse": "^0.6.6",
-    "wiredep": "^2.2.2",
-    "yargs": "^3.6.0"
+    "wiredep": "^2.2.2"
   }
 }