upgrade(postcss-loader): ^0.11.1 -> ^0.13.0

Author: David Zukowski

package.json

@@ -97,7 +97,7 @@
     "json-loader": "^0.5.4",
     "node-sass": "^3.7.0",
     "normalize.css": "^4.1.1",
-    "postcss-loader": "^0.11.1",
+    "postcss-loader": "^0.13.0",
     "react": "^15.0.0",
     "react-dom": "^15.0.0",
     "react-redux": "^4.4.5",