Update babel-loader to the latest version 🚀 (#282)

## Version **8.0.0** of **babel-loader** was just published.

<table>
  <tr>
    <th align=left>
      Dependency
    </th>
    <td>
      <a target=_blank href=https://github.com/babel/babel-loader>babel-loader</a>
    </td>
  </tr>
  <tr>
      <th align=left>
       Current Version
      </th>
      <td>
        7.1.5
      </td>
    </tr>
  <tr>
    <th align=left>
      Type
    </th>
    <td>
      devDependency
    </td>
  </tr>
</table>



The version **8.0.0** is **not covered** by your **current version range**.

If you don’t accept this pull request, your project will work just like it did before. However, you might be missing out on a bunch of new features, fixes and/or performance improvements from the dependency update.

It might be worth looking into these changes and trying to get this project onto the latest version of babel-loader.

If you have a solid test suite and good coverage, a passing build is a strong indicator that you can take advantage of these changes directly by merging the proposed change into your project. If the build fails or you don’t have such unconditional trust in your tests, this branch is a great starting point for you to work on the update.


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<details>
<summary>Release Notes</summary>
<strong>v8.0.0</strong>

<p>This is the first stable release of <code>babel-loader</code> for Babel 7.x.</p>
<ul>
<li>README updates</li>
<li>Dropped peer dependency on betas and RCs, but left the backward-compat code we had for now to give people time to migrate</li>
</ul>
</details>

<details>
<summary>Commits</summary>
<p>The new version differs by 53 commits ahead by 53, behind by 9.</p>
<ul>
<li><a href="https://urls.greenkeeper.io/babel/babel-loader/commit/a55fc2e59cdacd9bde6b3e044a361bae1e086a89"><code>a55fc2e</code></a> <code>8.0.0</code></li>
<li><a href="https://urls.greenkeeper.io/babel/babel-loader/commit/13d90b2d3137927811e5b4e0153b012a1d7b9c93"><code>13d90b2</code></a> <code>Prepare for 8.0.0 release.</code></li>
<li><a href="https://urls.greenkeeper.io/babel/babel-loader/commit/95e71fd6313a6651b5fe1e5d8d16447cbcdeba82"><code>95e71fd</code></a> <code>8.0.0-beta.6</code></li>
<li><a href="https://urls.greenkeeper.io/babel/babel-loader/commit/5eb1b0a1619c5429b8e5ddce79ea67f3230c3c14"><code>5eb1b0a</code></a> <code>Pass Babel's .caller option and pass supportsStaticESM:true. (#660)</code></li>
<li><a href="https://urls.greenkeeper.io/babel/babel-loader/commit/6a70942b0a5479edfd10f63a20150662d24d867c"><code>6a70942</code></a> <code>Read file before creating directory (#644)</code></li>
<li><a href="https://urls.greenkeeper.io/babel/babel-loader/commit/73922e952bc6f334d4cebafb5afb80d3d9ad2238"><code>73922e9</code></a> <code>Merge pull request #645 from Munter/patch-1</code></li>
<li><a href="https://urls.greenkeeper.io/babel/babel-loader/commit/d9e2ed60a45f1e9991f9868a8aa219630038c663"><code>d9e2ed6</code></a> <code>Update http-links to https</code></li>
<li><a href="https://urls.greenkeeper.io/babel/babel-loader/commit/2be502dcd86df940ffafdc3738eff6f876ba91b0"><code>2be502d</code></a> <code>Use MD4 instead of SHA1 for filename hashes (#639)</code></li>
<li><a href="https://urls.greenkeeper.io/babel/babel-loader/commit/a23f1c35521da65512be084ec4096a51908ffd76"><code>a23f1c3</code></a> <code>8.0.0-beta.4</code></li>
<li><a href="https://urls.greenkeeper.io/babel/babel-loader/commit/a2d86d9a1ed8a5b4f33b503e07af6935f119c7a2"><code>a2d86d9</code></a> <code>Return more data from <code>babel.transform</code>. (#629)</code></li>
<li><a href="https://urls.greenkeeper.io/babel/babel-loader/commit/1a7a4400da73d503166ca976da6eecd0cefd4774"><code>1a7a440</code></a> <code>Ensure that we don't accidentally publish 'latest'.</code></li>
<li><a href="https://urls.greenkeeper.io/babel/babel-loader/commit/7cbbd57023150060cda6cc61fedfff5f171ecd30"><code>7cbbd57</code></a> <code>8.0.0-beta.3</code></li>
<li><a href="https://urls.greenkeeper.io/babel/babel-loader/commit/5192a63540df99420982376d35fa705b4222b46c"><code>5192a63</code></a> <code>Update lint-staged to support Node 10</code></li>
<li><a href="https://urls.greenkeeper.io/babel/babel-loader/commit/ebedae17bb514779691f9c1cf84118c6eddd4d96"><code>ebedae1</code></a> <code>Expose API to allow implementing custom loaders around babel-loader. (#619)</code></li>
<li><a href="https://urls.greenkeeper.io/babel/babel-loader/commit/088f79c85b8f902e5b2751121b99c73bb203a3f3"><code>088f79c</code></a> <code>Handle ignored files properly</code></li>
</ul>
<p>There are 53 commits in total.</p>
<p>See the <a href="https://urls.greenkeeper.io/babel/babel-loader/compare/f3bfed932a959f7ffe3633e7f88cba0f3fcbf7b2...a55fc2e59cdacd9bde6b3e044a361bae1e086a89">full diff</a></p>
</details>

<details>
  <summary>FAQ and help</summary>

  There is a collection of [frequently asked questions](https://greenkeeper.io/faq.html). If those don’t help, you can always [ask the humans behind Greenkeeper](https://github.com/greenkeeperio/greenkeeper/issues/new).
</details>

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