Made it executable. Type `npm install -g` and the it's available as `emb...

…anhammond

Update exists-sync to the latest version 🚀

## Version **0.0.4** of [exists-sync](https://github.com/ember-cli/exists-sync) just got published.

<table>
  <tr>
    <th align=left>
      Dependency
    </td>
    <td>
      exists-sync
    </td>
  </tr>
  <tr>
    <th align=left>
      Current Version
    </td>
    <td>
      0.0.3
    </td>
  </tr>
  <tr>
    <th align=left>
      Type
    </td>
    <td>
      dependency
    </td>
  </tr>
</table>

The version **0.0.4** is **not covered** by your **current version range**.

Without accepting this pull request your project will work just like it did before. There might be a bunch of new features, fixes and perf improvements that the maintainers worked on for you though.

I recommend you look into these changes and try to get onto the latest version of exists-sync.
Given that you have a decent test suite, a passing build is a strong indicator that you can take advantage of these changes by merging the proposed change into your project. Otherwise this branch is a great starting point for you to work on the update.

---

<details>
<summary>Commits</summary>
<p>The new version differs by 11 commits .</p>

<ul>
<li>
<a href="proxy.php?url=https://urls.greenkeeper.io/ember-cli/exists-sync/commit/ed018fd670ec698d1e34d81ebac8c9b986ebedc2"><code>ed018fd</code></a> <code>0.0.4</code>
</li>
<li>
<a href="proxy.php?url=https://urls.greenkeeper.io/ember-cli/exists-sync/commit/060f9f744e36d616f4eba7bee78f9b4ee36ca27f"><code>060f9f7</code></a> <code>Merge pull request #5 from nathanhammond/normalize-yo</code>
</li>
<li>
<a href="proxy.php?url=https://urls.greenkeeper.io/ember-cli/exists-sync/commit/fa0f754f62dada3d4d57df98e1ada7da238f40d5"><code>fa0f754</code></a> <code>Merge pull request #6 from nathanhammond/npm-patch</code>
</li>
<li>
<a href="proxy.php?url=https://urls.greenkeeper.io/ember-cli/exists-sync/commit/d2f7ab90d024069fac06202bfdedde7a07ad0228"><code>d2f7ab9</code></a> <code>Prepare for npm version patch.</code>
</li>
<li>
<a href="proxy.php?url=https://urls.greenkeeper.io/ember-cli/exists-sync/commit/47253d6bae39714e51a97e0c93d7af445c0b7261"><code>47253d6</code></a> <code>Fix path normalization on the other side of a symlink.</code>
</li>
<li>
<a href="proxy.php?url=https://urls.greenkeeper.io/ember-cli/exists-sync/commit/f9529d04162211ace683930fe4dd35a2803a24ef"><code>f9529d0</code></a> <code>Failing test for #4.</code>
</li>
<li>
<a href="proxy.php?url=https://urls.greenkeeper.io/ember-cli/exists-sync/commit/8b132ef0cdc8cb90d1d3cdf5db1e2609a3a9287d"><code>8b132ef</code></a> <code>Merge pull request #3 from ember-cli/locks-patch-1</code>
</li>
<li>
<a href="proxy.php?url=https://urls.greenkeeper.io/ember-cli/exists-sync/commit/a220ebcd065eacf4318684fec061d4e9a69b4dac"><code>a220ebc</code></a> <code>Include only necessary files for npm package</code>
</li>
<li>
<a href="proxy.php?url=https://urls.greenkeeper.io/ember-cli/exists-sync/commit/7a4c0bf454114ea7475f238fd549d01af176f158"><code>7a4c0bf</code></a> <code>Merge branch 'master' of github.com:ember-cli/exists-sync</code>
</li>
<li>
<a href="proxy.php?url=https://urls.greenkeeper.io/ember-cli/exists-sync/commit/4bf257b79fd05617c5464d6c1146920065153e16"><code>4bf257b</code></a> <code>more test cleanup, added circular folder test</code>
</li>
<li>
<a href="proxy.php?url=https://urls.greenkeeper.io/ember-cli/exists-sync/commit/930ca0afa108731026bcc19bd8398534f56be53e"><code>930ca0a</code></a> <code>Add link to community guidelines as CODE_OF_CONDUCT.md</code>
</li>
</ul>

<p>See the <a href="proxy.php?url=https://urls.greenkeeper.io/ember-cli/exists-sync/compare/20e62eecb51d81e9cf9343de9754b41730c84c7f...ed018fd670ec698d1e34d81ebac8c9b986ebedc2">full diff</a>.</p>
</details>

<details>
<summary>Not sure how things should work exactly?</summary>

There is a collection of [frequently asked questions](https://greenkeeper.io/faq.html) and of course you may always [ask my humans](https://github.com/greenkeeperio/greenkeeper/issues/new).
</details>

---

Your [Greenkeeper](https://greenkeeper.io) Bot 🌴

…n-caching

add test-case