eslint: add github/array-foreach rule

packages/utils/lib/lang.ts

@@ -27,7 +27,7 @@ export interface LangConfig {
 export function parseLang(config: string): Record<string, LangConfig> {
     const file = yaml.load(config) as Record<string, LangConfig>;
     if (typeof file === 'undefined' || typeof file === 'string' || typeof file === 'number') throw new Error();
-    Object.keys(file).filter((i) => i.startsWith('_')).forEach((k) => delete file[k]);
+    for (const key of Object.keys(file)) if (key.startsWith('_')) delete file[key];
     for (const key in file) {
         const entry = file[key];
         if (key.includes('.')) {