fix: try skip cherow test on nodejs v4.

README.md

@@ -1,4 +1,4 @@
-# ast-matcher
+# ast-matcher [![Build Status](https://travis-ci.org/huochunpeng/ast-matcher.svg?branch=master)](https://travis-ci.org/huochunpeng/ast-matcher)
 
 Create pattern based AST matcher function. So you don't need to be an AST master in order to do static code analysis for JavaScript.
 

spec/cherow.spec.js

@@ -1,5 +1,7 @@
 'use strict';
-const cherow = require('cherow');
-const withParser = require('./with-parser');
 
-withParser('cherow', cherow.parseScript);
+if (!process.version.startsWith('v4')) {
+  const cherow = require('cherow');
+  const withParser = require('./with-parser');
+  withParser('cherow', cherow.parseScript);
+}