Bump rxjs from 7.0.0-beta.4 to 7.0.0-beta.5

Bumps [rxjs](https://github.com/reactivex/rxjs) from 7.0.0-beta.4 to 7.0.0-beta.5.
- [Release notes](https://github.com/reactivex/rxjs/releases)
- [Changelog](https://github.com/ReactiveX/rxjs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/reactivex/rxjs/compare/7.0.0-beta.4...7.0.0-beta.5)

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

package.json

@@ -39,7 +39,7 @@
     "lunr-languages": "^1.4.0",
     "resize-observer-polyfill": "^1.5.1",
     "ramda": "^0.27.1",
-    "rxjs": "^7.0.0-beta.4"
+    "rxjs": "^7.0.0-beta.5"
   },
   "devDependencies": {
     "@fortawesome/fontawesome-free": "^5.14.0",