set ecmaVersionto 2016 instead of 7

sindresorhus · sindresorhus · commit d9ab78a73af3 · 2016-09-16T18:53:42.000+07:00
diff --git a/index.js b/index.js
@@ -9,7 +9,7 @@ module.exports = {
 				es6: true
 			},
 			parserOptions: {
-				ecmaVersion: 7,
+				ecmaVersion: 2016,
 				sourceType: 'module'
 			},
 			rules: {
