fix(deps): upgrade eslint and plugins to 9.39.4 (#201701)

* fix(deps): upgrade eslint and plugins to 10.2.0

* chore: manual lint-fix

* chore: automatic lint-fix

* feat(repo): github actions - lint - use node v24

because it is linting (not runtime), so why not
to use the latest stable Node version

* fix: remove @stylistic/eslint-plugin (in favor of prettier)

* fix: eslint uses `ecmaVersion` 2025

* fix: eslint's "mocha" config is isolated (for test files only)

for example `describe` is not considered "global" outside the
test files. the same for all other "eslint/mocha" rules -
they are applied only to files in `/tests` folder.

* chore: update package-lock.json after eslint upgrade

.github/workflows/lint.yml

@@ -9,12 +9,12 @@ jobs:
         name: ESLint
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v2
-            - name: Install node v14
-              uses: actions/setup-node@v2
+            - uses: actions/checkout@v4
+            - name: Install node v24
+              uses: actions/setup-node@v4
               with:
-                  node-version: '14'
+                  node-version: '24'
             - name: Install dependencies
               run: npm install
             - name: Run ESLint
-              run: ./node_modules/.bin/eslint .
+              run: npm run lint