fix: update webpack dependencies (#675)

fixes #674

Author: sis0k0

package.json

@@ -78,21 +78,21 @@
  "semver": "5.4.1",
  "shelljs": "0.6.0",
  "tapable": "1.0.0",
- "webpack": "~4.6.0",
- "webpack-cli": "~2.1.3",
- "webpack-bundle-analyzer": "~2.13.0",
- "webpack-sources": "~1.1.0",
+ "webpack": "~4.20.2",
+ "webpack-cli": "~3.1.1",
+ "webpack-bundle-analyzer": "~3.0.2",
+ "webpack-sources": "~1.3.0",
  "clean-webpack-plugin": "~0.1.19",
- "copy-webpack-plugin": "~4.5.1",
+ "copy-webpack-plugin": "~4.5.2",
  "raw-loader": "~0.5.1",
- "css-loader": "~0.28.11",
+ "css-loader": "~1.0.0",
  "nativescript-worker-loader": "~0.9.0",
  "extract-text-webpack-plugin": "~3.0.2",
  "uglifyjs-webpack-plugin": "~1.2.5",
  "@angular-devkit/core": "~0.8.1",
- "resolve-url-loader": "~2.3.0",
- "awesome-typescript-loader": "~5.0.0",
- "sass-loader": "~7.0.1"
+ "resolve-url-loader": "~3.0.0",
+ "awesome-typescript-loader": "~5.2.1",
+ "sass-loader": "~7.1.0"
  },
  "devDependencies": {
  "@ngtools/webpack": "~6.2.0",