Trying postcss 6.0.13 and cssnano 4.0.0-rc.2

Author: domehead100

package.json

@@ -14,12 +14,12 @@
   "dependencies": {
     "babel-code-frame": "^6.11.0",
     "css-selector-tokenizer": "^0.7.0",
-    "cssnano": ">=2.6.1 <4",
+    "cssnano": ">4.0.0-rc.2",
     "icss-utils": "^2.1.0",
     "loader-utils": "^1.0.2",
     "lodash.camelcase": "^4.3.0",
     "object-assign": "^4.0.1",
-    "postcss": "^5.0.6",
+    "postcss": "^6.0.13",
     "postcss-modules-extract-imports": "^1.0.0",
     "postcss-modules-local-by-default": "^1.0.1",
     "postcss-modules-scope": "^1.0.0",