Upgrade to Webpack 4 - fix CSS import order

Signed-off-by: David Mehren <dmehren1@gmail.com>

package.json

@@ -178,7 +178,7 @@
     "less": "^2.7.1",
     "less-loader": "^4.1.0",
     "mini-css-extract-plugin": "^0.4.1",
-    "optimize-css-assets-webpack-plugin": "^4.0.3",
+    "optimize-css-assets-webpack-plugin": "^5.0.0",
     "script-loader": "^0.7.2",
     "standard": "^9.0.1",
     "string-loader": "^0.0.1",
@@ -186,7 +186,7 @@
     "uglifyjs-webpack-plugin": "^1.2.7",
     "url-loader": "^1.0.1",
     "webpack": "^4.14.0",
-    "webpack-cli": "^3.0.8",
+    "webpack-cli": "^3.1.0",
     "webpack-parallel-uglify-plugin": "^1.1.0"
   },
   "standard": {