Upload linux and windows assets

Author: kevinsawicki

script/release

@@ -42,6 +42,14 @@ const zipAssets = () => {
   const assets = [{
     name: 'electron-api-demos-mac.zip',
     path: path.join(__dirname, '..', 'out', 'Electron API Demos-darwin-x64', 'Electron API Demos.app')
+  },
+  {
+    name: 'electron-api-demos-windows.zip',
+    path: path.join(__dirname, '..', 'out', 'Electron API Demos-win32-ia32')
+  },
+  {
+    name: 'electron-api-demos-linux.zip',
+    path: path.join(__dirname, '..', 'out', 'Electron API Demos-linux-x64')
   }]
   return Promise.all(assets.map(zipAsset))
 }