chore: downgrade eslint to 8.x

eslint 9 is still too new and its ecosystem is simply not ready yet, so we (Carlos Serrano and me) decided to downgrade it to eslint 8. Also remove babel-eslint since it is discontinued in favour of the default eslint parser "espree"

BREAKING CHANGE: downgrade eslint from 9 to 8

Issues: MOL-29362

configurations/base.js

@@ -4,7 +4,7 @@ module.exports = {
     "es6": true,
     "node": true
   },
-  "parser": "babel-eslint",
+  "parser": "espree", // default one: https://eslint.org/docs/v8.x/use/configure/parser
   "parserOptions": {
     "ecmaFeatures": {
       "experimentalObjectRestSpread": true,

package.json

@@ -4,7 +4,7 @@
     "eslint-import-resolver-webpack": "^0.13.8"
   },
   "dependencies": {
-    "babel-eslint": "^10.1.0",
+    "eslint": "^8.57.0",
     "eslint-plugin-babel": "^5.3.1",
     "eslint-plugin-filenames": "^1.3.2",
     "eslint-plugin-import": "^2.29.1",
@@ -18,16 +18,12 @@
     "eslint-plugin-unicorn": "^52.0.0"
   },
   "devDependencies": {
-    "eslint": "^9.0.0",
     "husky": "^7.0.2",
     "semantic-release": "^22.0.12"
   },
   "engines": {
     "node": ">=18.18"
   },
-  "peerDependencies": {
-    "eslint": "^9.0.0"
-  },
   "keywords": [
     "eslint",
     "config"