Fix test for 0.12

Author: Faleij

test-src/index.js test-src/JsonStreamStringify.jstest-src/index.js renamed to test-src/JsonStreamStringify.js

@@ -1,7 +1,7 @@
 
 import { Readable } from 'stream';
 import expect from 'expect.js';
-import JsonStreamStringify from '.';
+import JsonStreamStringify from './JsonStreamStringify';
 
 function createTest(input, expected, ...args) {
   return () => new Promise((resolve, reject) => {