Bump react-dom from 16.8.4 to 16.8.5 in /frontend

Bumps [react-dom](https://github.com/facebook/react/tree/HEAD/packages/react-dom) from 16.8.4 to 16.8.5.
- [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/v16.8.5/packages/react-dom)

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

Author: dependabot-support

frontend/package.json

@@ -12,7 +12,7 @@
     "react": "^16.8.5",
     "react-bootstrap": "^0.32.1",
     "react-codemirror2": "^5.0.1",
-    "react-dom": "^16.8.3",
+    "react-dom": "^16.8.5",
     "react-helmet": "^5.2.0",
     "react-scripts": "1.1.5",
     "react-split-pane": "^0.1.87",

frontend/yarn.lock

@@ -8410,15 +8410,15 @@ react-dev-utils@^5.0.2:
     strip-ansi "3.0.1"
     text-table "0.2.0"
 
-react-dom@^16.8.3:
-  version "16.8.4"
-  resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-16.8.4.tgz#1061a8e01a2b3b0c8160037441c3bf00a0e3bc48"
-  integrity sha512-Ob2wK7XG2tUDt7ps7LtLzGYYB6DXMCLj0G5fO6WeEICtT4/HdpOi7W/xLzZnR6RCG1tYza60nMdqtxzA8FaPJQ==
+react-dom@^16.8.5:
+  version "16.8.5"
+  resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-16.8.5.tgz#b3e37d152b49e07faaa8de41fdf562be3463335e"
+  integrity sha512-VIEIvZLpFafsfu4kgmftP5L8j7P1f0YThfVTrANMhZUFMDOsA6e0kfR6wxw/8xxKs4NB59TZYbxNdPCDW34x4w==
   dependencies:
     loose-envify "^1.1.0"
     object-assign "^4.1.1"
     prop-types "^15.6.2"
-    scheduler "^0.13.4"
+    scheduler "^0.13.5"
 
 react-error-overlay@^4.0.1:
   version "4.0.1"