Require trailing comma

Author: alexesprit

index.js

@@ -78,6 +78,9 @@ module.exports = {
 		// Require CamelCase
 		camelcase: ['error', { properties: 'never' }],
 
+		// Require or disallow trailing commas
+		'comma-dangle': ['error', 'always-multiline'],
+
 		// Require space after comma
 		'comma-spacing': ['error', { after: true }],