Upgrade front end dependencies

Mostly in order to get rid of deprecated deps, and upgrade vulnerable ones.

  - Upgrade webpack from 3.x to 4.x
  - Moved babel package to main repo
  - Replaced deprecated extract-text-webpack-plugin with extract-text-webpack-plugin
  - Replaced deprecated babel-minify-webpack-plugin with terser-webpack-plugin
  - Replaced deprecated node-sass with (dart) sass package
  - Replaced deprecated sass-lint with stylelint (the rules might be a bit different

Related to #1531: trivy doesn't raise any more issue

1 files changed, 16 insertions, 15 deletions

diff --git a/package.json b/package.json
index dc2b2872..8a24512a 100644
--- a/package.json
+++ b/package.json
@@ -11,22 +11,23 @@
     "purecss": "^1.0.0"
   },
   "devDependencies": {
-    "babel-core": "^6.26.0",
-    "babel-loader": "^7.1.2",
-    "babel-minify-webpack-plugin": "^0.2.0",
-    "babel-preset-env": "^1.6.1",
-    "css-loader": "^0.28.9",
-    "eslint": "^4.16.0",
-    "eslint-config-airbnb-base": "^12.1.0",
-    "eslint-plugin-import": "^2.8.0",
-    "extract-text-webpack-plugin": "^3.0.2",
+    "@babel/core": "^7.11.6",
+    "@babel/preset-env": "^7.11.5",
+    "babel-loader": "^8.1.0",
+    "css-loader": "^4.3.0",
+    "eslint": "^7.9.0",
+    "eslint-config-airbnb-base": "^14.2.0",
+    "eslint-plugin-import": "^2.22.0",
     "file-loader": "^1.1.6",
-    "node-sass": "^4.13.1",
-    "sass-lint": "^1.12.1",
-    "sass-loader": "^6.0.6",
-    "style-loader": "^0.19.1",
-    "url-loader": "^0.6.2",
-    "webpack": "^3.10.0"
+    "mini-css-extract-plugin": "^0.11.2",
+    "sass": "^1.26.11",
+    "sass-loader": "^10.0.2",
+    "stylelint": "^13.7.1",
+    "stylelint-config-standard": "^20.0.0",
+    "stylelint-scss": "^3.18.0",
+    "terser-webpack-plugin": "^4.2.2",
+    "webpack": "^4.44.2",
+    "webpack-cli": "^3.3.12"
   },
   "scripts": {
     "build": "webpack",