Bump react-dom from 16.10.1 to 16.12.0 (#50)

Bumps [react-dom](https://github.com/facebook/react/tree/HEAD/packages/react-dom) from 16.10.1 to 16.12.0.
- [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/v16.12.0/packages/react-dom)

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

package.json

@@ -27,7 +27,7 @@
     "prop-types": "^15.6.2",
     "query-string": "^6.9.0",
     "react": "^16.12.0",
-    "react-dom": "^16.8.0",
+    "react-dom": "^16.12.0",
     "react-select": "^3.0.4",
     "react-spring": "^8.0.7",
     "url-pattern": "^1.0.3"