Bump react-dom from 16.8.6 to 16.9.0

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

@@ -110,7 +110,7 @@
     "octicons": "^8.5.0",
     "raw-loader": "^3.1.0",
     "react": "^16.9.0",
-    "react-dom": "^16.8.6",
+    "react-dom": "^16.9.0",
     "react-test-renderer": "^16.9.0",
     "sinon": "^7.4.1",
     "sinon-chai": "^3.3.0",

yarn.lock

@@ -11900,15 +11900,15 @@ react-dev-utils@^9.0.0:
     strip-ansi "5.2.0"
     text-table "0.2.0"
 
-react-dom@^16.8.3, 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@^16.8.3, 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@^3.1.1:
   version "3.3.0"
@@ -12862,14 +12862,6 @@ sax@^1.2.4:
   version "1.2.4"
   resolved "https://registry.yarnpkg.com/sax/-/sax-1.2.4.tgz#2816234e2378bddc4e5354fab5caa895df7100d9"
 
-scheduler@^0.13.6:
-  version "0.13.6"
-  resolved "https://registry.yarnpkg.com/scheduler/-/scheduler-0.13.6.tgz#466a4ec332467b31a91b9bf74e5347072e4cd889"
-  integrity sha512-IWnObHt413ucAYKsD9J1QShUKkbKLQQHdxRyw73sw4FN26iWr3DY/H34xGPe4nmL1DwXyWmSWmMrA9TfQbE/XQ==
-  dependencies:
-    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"