Fix tests

Author: GarboMuffin

test/packager/download-project.test.js

@@ -1,10 +1,8 @@
+import './polyfill';
 import fs from 'fs';
 import path from 'path';
-import Blob from 'node-blob';
 import {downloadProject} from '../../src/packager/download-project'
 
-global.Blob = Blob;
-
 const readTestProject = (name) => {
   const buffer = fs.readFileSync(path.resolve(__dirname, 'projects', name));
   return buffer.buffer.slice(buffer.byteOffset, buffer.byteOffset + buffer.byteLength);

test/packager/polyfill.js

@@ -0,0 +1,2 @@
+import Blob from 'node-blob';
+global.Blob = Blob;