Update eslint-plugin-react to the latest version 🚀 (#115)

## The devDependency [eslint-plugin-react](https://github.com/yannickcr/eslint-plugin-react) was updated from `7.12.1` to `7.12.2`.
This version 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.

---

<details>
<summary>Release Notes for v7.12.2</summary>

<h3>Fixed</h3>
<ul>
<li><a href="/yannickcr/eslint-plugin-react/blob/v7.12.2/docs/rules/prop-types.md"><code>prop-types</code></a>: avoid crash on used prevProps (<a href="https://urls.greenkeeper.io/yannickcr/eslint-plugin-react/issues/2095" data-hovercard-type="issue" data-hovercard-url="/jsx-eslint/eslint-plugin-react/issues/2095/hovercard">#2095</a>, <a class="user-mention" data-hovercard-type="user" data-hovercard-url="/hovercards?user_id=45469" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://urls.greenkeeper.io/ljharb">@ljharb</a>)</li>
<li>Version warning: Link does not end with '.' (<a href="https://urls.greenkeeper.io/yannickcr/eslint-plugin-react/pull/2103" data-hovercard-type="pull_request" data-hovercard-url="/jsx-eslint/eslint-plugin-react/pull/2103/hovercard">#2103</a>, <a class="user-mention" data-hovercard-type="user" data-hovercard-url="/hovercards?user_id=6134547" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://urls.greenkeeper.io/yoyo837">@yoyo837</a>))</li>
<li><a href="/yannickcr/eslint-plugin-react/blob/v7.12.2/docs/rules/forbid-prop-types.md"><code>forbid-prop-types</code></a>: fix crash with propWrapper check on MemberExpressions (<a href="https://urls.greenkeeper.io/yannickcr/eslint-plugin-react/issues/2104" data-hovercard-type="issue" data-hovercard-url="/jsx-eslint/eslint-plugin-react/issues/2104/hovercard">#2104</a>, <a class="user-mention" data-hovercard-type="user" data-hovercard-url="/hovercards?user_id=45469" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://urls.greenkeeper.io/ljharb">@ljharb</a>)</li>
</ul>
</details>

<details>
<summary>Commits</summary>
<p>The new version differs by 5 commits.</p>
<ul>
<li><a href="https://urls.greenkeeper.io/yannickcr/eslint-plugin-react/commit/c93cbc60b1847ef09c0b569ec997fb20dfca7c5a"><code>c93cbc6</code></a> <code>Update CHANGELOG and bump version</code></li>
<li><a href="https://urls.greenkeeper.io/yannickcr/eslint-plugin-react/commit/e71feb54e6aadaaca9f149c98835c8d2acf67fc9"><code>e71feb5</code></a> <code>[Fix] <code>forbid-prop-types</code>: fix crash with propWrapper check on MemberExpressions</code></li>
<li><a href="https://urls.greenkeeper.io/yannickcr/eslint-plugin-react/commit/11a66c050b294a2315c427c5f97ad6ea16c591cd"><code>11a66c0</code></a> <code>Merge pull request #2103 from yoyo837/patch-1</code></li>
<li><a href="https://urls.greenkeeper.io/yannickcr/eslint-plugin-react/commit/e9cfc16d83d3163ceeca7f4f91f20e3aef5d9ce9"><code>e9cfc16</code></a> <code>Link does not end with '.'</code></li>
<li><a href="https://urls.greenkeeper.io/yannickcr/eslint-plugin-react/commit/4da90ea19f805cb8e67523a983c2352aab144783"><code>4da90ea</code></a> <code>[Fix] <code>prop-types</code>: avoid crash on used prevProps</code></li>
</ul>
<p>See the <a href="https://urls.greenkeeper.io/yannickcr/eslint-plugin-react/compare/0202de33df142df60affb1924398ccd5bb453d9a...c93cbc60b1847ef09c0b569ec997fb20dfca7c5a">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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package.json

@@ -42,7 +42,7 @@
     "eslint-plugin-import": "^2.14.0",
     "eslint-plugin-jsx-a11y": "^6.1.1",
     "eslint-plugin-prefer-object-spread": "^1.2.1",
-    "eslint-plugin-react": "7.12.1",
+    "eslint-plugin-react": "7.12.2",
     "jest": "^23.5.0",
     "jest-cli": "^23.5.0",
     "jsdoc": "^3.4.3",