tools: enable eslint no-whitespace-before-property rule

PR-URL: https://github.com/nodejs/node/pull/18831
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Matheus Marchini <matheus@sthima.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

.eslintrc.js

@@ -212,6 +212,7 @@ module.exports = {
     'no-tabs': 'error',
     'no-trailing-spaces': 'error',
     'no-unsafe-finally': 'error',
+    'no-whitespace-before-property': 'error',
     'object-curly-spacing': ['error', 'always'],
     'one-var-declaration-per-line': 'error',
     'operator-linebreak': ['error', 'after'],