eslint: enforce use of const when variable not modified

.eslintrc.js

@@ -32,12 +32,17 @@ module.exports = {
     /** @todo cognitive complexity should be much lower (25-50?) */
     "sonarjs/cognitive-complexity": [ "warn", 200 ],
     /** @todo no param reassign creates too many warnings but should be a warning */
-    "comma-dangle": [ "error" ],
     "no-param-reassign": "off",
+    /** @todo no use before define creates too many warnings but should be a warning */
+    "no-use-before-define": "off",
+    /** @todo camel case creates too many warnings but should be a warning */
+    "camelcase": "off",
+    "comma-dangle": [ "error" ],
     "node/no-unsupported-features/es-syntax": 0,
     "no-unused-vars": [ "error", { "argsIgnorePattern": "^_" } ],
     "sonarjs/no-duplicate-string": 0,
     "semi" : "error",
+    "prefer-const": "error",
     "no-trailing-spaces": "error",
     "array-bracket-spacing": [ "error", "always" ],
     "comma-spacing": "error",
@@ -85,7 +90,8 @@ module.exports = {
     {
       files: [ 'src/editor/locale/*.js' ],
       rules: { // lang files may have long length
-        "max-len": "off"
+        "max-len": "off",
+        "camelcase": "off"
       }
     }
   ]