Bump trim and react-markdown

Removes [trim](https://github.com/Trott/trim). It's no longer used after updating ancestor dependency [react-markdown](https://github.com/remarkjs/react-markdown). These dependencies need to be updated together.


Removes `trim`

Updates `react-markdown` from 4.3.1 to 8.0.3
- [Release notes](https://github.com/remarkjs/react-markdown/releases)
- [Changelog](https://github.com/remarkjs/react-markdown/blob/main/changelog.md)
- [Commits](https://github.com/remarkjs/react-markdown/compare/v4.3.1...8.0.3)

---
updated-dependencies:
- dependency-name: trim
  dependency-type: indirect
- dependency-name: react-markdown
  dependency-type: direct:production
...

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

package.json

@@ -34,7 +34,7 @@
     "react-dom": "^16.14.0",
     "react-ga": "^2.7.0",
     "react-loadable": "^5.5.0",
-    "react-markdown": "^4.3.1",
+    "react-markdown": "^8.0.3",
     "react-redux": "^7.2.3",
     "react-router": "^5.2.0",
     "react-router-dom": "^5.2.0",