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, 15 insertions, 0 deletions

diff --git a/.dev/.stylelintrc.js b/.dev/.stylelintrc.js
new file mode 100644
index 00000000..a754e33b
--- /dev/null
+++ b/.dev/.stylelintrc.js
@@ -0,0 +1,15 @@
+module.exports = {
+  extends: 'stylelint-config-standard',
+  plugins: [
+    "stylelint-scss"
+  ],
+  rules: {
+    "indentation": [2],
+    "number-leading-zero": null,
+    // Replace CSS @ with SASS ones
+    "at-rule-no-unknown": null,
+    "scss/at-rule-no-unknown": true,
+    // not compatible with SASS apparently
+    "no-descending-specificity": null
+  },
+}