Bump react-native-flipper from 0.49.0 to 0.51.0 in /react-native/ReactNativeFlipperExample (#1419)

Summary:
Bumps [react-native-flipper](https://github.com/facebook/flipper) from 0.49.0 to 0.51.0.
<details>
<summary>Commits</summary>
<ul>
<li><a href="5dc98bab9d"><code>5dc98ba</code></a> Flipper Release: v0.51.0</li>
<li><a href="323c9d25d4"><code>323c9d2</code></a> Fix layout of error and doctor bars</li>
<li><a href="9ada27526c"><code>9ada275</code></a> Change RatingButton to use Popover2</li>
<li><a href="d7a6356fb6"><code>d7a6356</code></a> Add Popover2 component</li>
<li><a href="5a56ee65b8"><code>5a56ee6</code></a> Fix contributing image link</li>
<li><a href="ce180a106f"><code>ce180a1</code></a> Log login success rate</li>
<li><a href="6561bc8f16"><code>6561bc8</code></a> Added connection between InAppErrorReporter and Flipper Desktop App via Layou...</li>
<li><a href="9e4c5363c5"><code>9e4c536</code></a> Deep-linking records to other strong records in the Store tab</li>
<li><a href="7d06571cfa"><code>7d06571</code></a> Add marker start and end to App to measure the startup time for Flipper (<a href="https://github-redirect.dependabot.com/facebook/flipper/issues/1398">https://github.com/facebook/flipper/issues/1398</a>)</li>
<li><a href="33cd7d29df"><code>33cd7d2</code></a> Set up coveralls Jest coverage tracking on GitHub (<a href="https://github-redirect.dependabot.com/facebook/flipper/issues/1392">https://github.com/facebook/flipper/issues/1392</a>)</li>
<li>Additional commits viewable in <a href="https://github.com/facebook/flipper/compare/v0.49.0...v0.51.0">compare view</a></li>
</ul>
</details>
<br />

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</details>

Pull Request resolved: https://github.com/facebook/flipper/pull/1419

Reviewed By: mweststrate

Differential Revision: D22896632

Pulled By: passy

fbshipit-source-id: c1a89a86f354befe18a996f6bcdaa6ec74bcf815

react-native/ReactNativeFlipperExample/yarn.lock

@@ -5297,10 +5297,10 @@ react-is@^16.12.0, react-is@^16.8.1, react-is@^16.8.4, react-is@^16.8.6:
   resolved "https://registry.yarnpkg.com/react-is/-/react-is-16.13.0.tgz#0f37c3613c34fe6b37cd7f763a0d6293ab15c527"
   integrity sha512-GFMtL0vHkiBv9HluwNZTggSn/sCyEt9n02aM0dSAjGGyqyNlAyftYm4phPxdvCigG15JreC5biwxCgTAJZ7yAA==
 
-react-native-flipper@^0.49.0:
-  version "0.49.0"
-  resolved "https://registry.yarnpkg.com/react-native-flipper/-/react-native-flipper-0.49.0.tgz#8fd19b7cd8af1e7772ece07e54366aa751a87016"
-  integrity sha512-Y0fIwEyEsouYKbyve71Ps7cUryDcEGLY2EOyve6p9gNMDdpVIfo040JgwCOD/2s+AjWK3C7F0wl4IXIrnF+wiA==
+react-native-flipper@^0.51.0:
+  version "0.51.0"
+  resolved "https://registry.yarnpkg.com/react-native-flipper/-/react-native-flipper-0.51.0.tgz#e51807aa939f54520c0ab1803424924078e7cd56"
+  integrity sha512-YpgBrqNRvyEd7UcaY9rwGkQALHl1Ghl7+gmtLXcraokwrnI72UMlE4lUdtWLlY/GVLy0MWkshPSyJNgvutsFYA==
 
 react-native@^0.62.2:
   version "0.62.2"