update optimize-css-assets-webpack-plugin

package.json

@@ -55,7 +55,7 @@
     "html-webpack-plugin": "^2.28.0",
     "http-proxy-middleware": "^0.17.4",
     "opn": "^4.0.2",
-    "optimize-css-assets-webpack-plugin": "^1.3.0",
+    "optimize-css-assets-webpack-plugin": "^1.3.2",
     "ora": "^1.1.0",
     "rimraf": "^2.6.1",
     "semver": "^5.3.0",