Bump react-dom from 16.8.6 to 16.9.0 (#501)

Bumps [react-dom](https://github.com/facebook/react/tree/HEAD/packages/react-dom) from 16.8.6 to 16.9.0.
- [Release notes](https://github.com/facebook/react/releases)
- [Changelog](https://github.com/facebook/react/blob/master/CHANGELOG.md)
- [Commits](https://github.com/facebook/react/commits/v16.9.0/packages/react-dom)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -104,7 +104,7 @@
  "react": "16.8.6",
  "react-addons-perf": "^15.4.2",
  "react-apollo": "^2.5.8",
- "react-dom": "16.8.6",
+ "react-dom": "16.9.0",
  "react-markdown": "^4.0.6",
  "react-redux": "5",
  "react-router-dom": "4.3.1",

yarn.lock

@@ -9335,15 +9335,15 @@ react-deep-force-update@^1.0.0:
  resolved "https://registry.yarnpkg.com/react-deep-force-update/-/react-deep-force-update-1.1.2.tgz#3d2ae45c2c9040cbb1772be52f8ea1ade6ca2ee1"
  integrity sha512-WUSQJ4P/wWcusaH+zZmbECOk7H5N2pOIl0vzheeornkIMhu+qrNdGFm0bDZLCb0hSF0jf/kH1SgkNGfBdTc4wA==
 
-react-dom@16.8.6:
- version "16.8.6"
- resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-16.8.6.tgz#71d6303f631e8b0097f56165ef608f051ff6e10f"
- integrity sha512-1nL7PIq9LTL3fthPqwkvr2zY7phIPjYrT0jp4HjyEQrEROnw4dG41VVwi/wfoCneoleqrNX7iAD+pXebJZwrwA==
+react-dom@16.9.0:
+ version "16.9.0"
+ resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-16.9.0.tgz#5e65527a5e26f22ae3701131bcccaee9fb0d3962"
+ integrity sha512-YFT2rxO9hM70ewk9jq0y6sQk8cL02xm4+IzYBz75CQGlClQQ1Bxq0nhHF6OtSbit+AIahujJgb/CPRibFkMNJQ==
  dependencies:
  loose-envify "^1.1.0"
  object-assign "^4.1.1"
  prop-types "^15.6.2"
- scheduler "^0.13.6"
+ scheduler "^0.15.0"
 
 react-draggable@3.0.5:
  version "3.0.5"
@@ -10340,6 +10340,14 @@ scheduler@^0.13.6:
  loose-envify "^1.1.0"
  object-assign "^4.1.1"
 
+scheduler@^0.15.0:
+ version "0.15.0"
+ resolved "https://registry.yarnpkg.com/scheduler/-/scheduler-0.15.0.tgz#6bfcf80ff850b280fed4aeecc6513bc0b4f17f8e"
+ integrity sha512-xAefmSfN6jqAa7Kuq7LIJY0bwAPG3xlCj0HMEBQk1lxYiDKZscY2xJ5U/61ZTrYbmNQbXa+gc7czPkVo11tnCg==
+ dependencies:
+ loose-envify "^1.1.0"
+ object-assign "^4.1.1"
+
 schema-utils@^0.4.0, schema-utils@^0.4.3, schema-utils@^0.4.4, schema-utils@^0.4.5:
  version "0.4.7"
  resolved "https://registry.yarnpkg.com/schema-utils/-/schema-utils-0.4.7.tgz#ba74f597d2be2ea880131746ee17d0a093c68187"