chore(package): bump webpack to 2.2.0

Author: Awk34

templates/app/_package.json

@@ -138,7 +138,7 @@
     "run-sequence": "^1.1.0",
     "lazypipe": "^1.0.1",
     <%# WEBPACK %>
-    "webpack": "2.2.0-rc.2",
+    "webpack": "2.2.0",
     "webpack-dev-middleware": "^1.9.0",
     "webpack-dev-server": "^2.2.0-rc.0",
     "extract-text-webpack-plugin": "2.0.0-beta.4",