set id match to enforce snake_case

index.js

@@ -132,7 +132,8 @@ module.exports = {
     'array-element-newline': ['error', { multiline: true, minItems: 2 }],
     'block-spacing': ['error', 'always'],
     'brace-style': ['error', 'stroustrup', { allowSingleLine: true }],
-    camelcase: 'error',
+    camelcase: 'off',
+    'id-match': ['error', '^[a-z][a-z-]*$', { onlyDeclarations: true }],
     'comma-dangle': ['error', 'never'],
     'comma-spacing': 'error',
     'comma-style': 'error',