Use node version to pick a parser and skip unsupported tests

Author: vhfmag

__tests__/helper.js

@@ -1,6 +1,10 @@
 import getProp from '../src/getProp';
 
-const parser = require('@babel/parser');
+const nodeVersion = parseInt(process.version.match(/^v(\d+)\./)[1], 10);
+
+export const fallbackToBabylon = nodeVersion < 6;
+
+const parser = fallbackToBabylon ? require('babylon') : require('@babel/parser');
 
 const defaultPlugins = ['jsx', 'functionBind', 'estree', 'objectRestSpread', 'optionalChaining'];
 let plugins = [...defaultPlugins];

__tests__/src/getPropValue-test.js

@@ -1,9 +1,11 @@
 /* eslint-env mocha */
 /* eslint no-template-curly-in-string: 0 */
 import assert from 'assert';
-import { extractProp, changePlugins } from '../helper';
+import { extractProp, changePlugins, fallbackToBabylon } from '../helper';
 import getPropValue from '../../src/getPropValue';
 
+const describeIfNotBabylon = fallbackToBabylon ? describe.skip : describe;
+
 describe('getPropValue', () => {
   it('should export a function', () => {
     const expected = 'function';
@@ -876,7 +878,7 @@ describe('getPropValue', () => {
     });
   });
 
-  describe('Typescript', () => {
+  describeIfNotBabylon('Typescript', () => {
     beforeEach(() => {
       changePlugins(pls => [...pls, 'typescript']);
     });