allow .server.[ext] file extension

This change updates the recommended eslint config to match the `.server.[ext]` file extension introduced in github/github#247398 ... although the actual extension is under discussion and may change.

Author: theinterned

lib/configs/recommended.js

@@ -18,7 +18,7 @@ module.exports = {
     'eslint-comments/no-unused-disable': 'error',
     'eslint-comments/no-unused-enable': 'error',
     'eslint-comments/no-use': ['error', {allow: ['eslint', 'eslint-disable-next-line', 'eslint-env', 'globals']}],
-    'filenames/match-regex': ['error', '^[a-z0-9-]+(.d|.config)?$'],
+    'filenames/match-regex': ['error', '^[a-z0-9-]+(.d|.config|.server)?$'],
     'func-style': ['error', 'declaration', {allowArrowFunctions: true}],
     'github/array-foreach': 'error',
     'github/no-implicit-buggy-globals': 'error',