Bump rxjs from 6.4.0 to 6.5.1

Bumps [rxjs](https://github.com/reactivex/rxjs) from 6.4.0 to 6.5.1.
- [Release notes](https://github.com/reactivex/rxjs/releases)
- [Changelog](https://github.com/ReactiveX/rxjs/blob/master/CHANGELOG.md)
- [Commits](ReactiveX/rxjs@6.4.0...6.5.1)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot-support

package-lock.json

@@ -58,7 +58,7 @@
     "fs": "0.0.1-security",
     "npm-run-all": "4.1.5",
     "npx": "^10.2.0",
-    "rxjs": "^6.4.0",
+    "rxjs": "^6.5.1",
     "stream": "0.0.2",
     "ts-node": "~8.1.0",
     "tslint": "~5.16.0",