Bump spectron from 11.0.0 to 14.0.0 in /desktop (#2071)

Summary:
allow-large-files
Bumps [spectron](https://github.com/electron/spectron) from 11.0.0 to 14.0.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/electron/spectron/releases">spectron's releases</a>.</em></p>
<blockquote>
<h2>v13.0.0</h2>
<p>No release notes provided.</p>
<h2>v12.0.0</h2>
<p>No release notes provided.</p>
<h2>v11.1.0</h2>
<p>Upgraded webdriverio to 6.1.20 <a href="https://github.com/electron/spectron/issues/631">https://github.com/facebook/flipper/issues/631</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li>See full diff in <a href="https://github.com/electron/spectron/commits">compare view</a></li>
</ul>
</details>
<br />

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</details>

Pull Request resolved: https://github.com/facebook/flipper/pull/2071

Test Plan:
Imported from GitHub, without a `Test Plan:` line.

yarn test-e2e

Test Suite Succeded after running yarn test-e2e

Reviewed By: passy

Differential Revision: D27230110

Pulled By: priteshrnandgaonkar

fbshipit-source-id: d6d2d6c1482fa563b9dde9472467f918496e2cea

desktop/e2e/open.ts

@@ -30,8 +30,8 @@ async function testSuite(app: Application) {
   await app.client.waitUntilWindowLoaded();
   app.browserWindow.focus();
   await app.client.waitUntilTextExists('html', 'Changelog');
-  await app.client.$('div[type="primary"]=Close').click();
-  await app.client.$('div=Manage Plugins').click();
+  (await app.client.$('div[type="primary"]=Close')).click();
+  (await app.client.$('div=Manage Plugins')).click();
 }
 
 export default function test() {
@@ -54,7 +54,7 @@ export default function test() {
     })
     .then(function (title) {
       // Verify the window's title
-      assert.equal(title, 'Flipper');
+      assert.equal(title.includes('Flipper'), true);
     })
     .then(async function () {
       await testSuite(app);