Bump rxjs from 6.6.2 to 7.8.1

Bumps [rxjs](https://github.com/reactivex/rxjs) from 6.6.2 to 7.8.1.
- [Release notes](https://github.com/reactivex/rxjs/releases)
- [Changelog](https://github.com/ReactiveX/rxjs/blob/7.8.1/CHANGELOG.md)
- [Commits](ReactiveX/rxjs@6.6.2...7.8.1)

---
updated-dependencies:
- dependency-name: rxjs
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

package.json

@@ -62,7 +62,7 @@
     "rc": "1.2.8",
     "redux": "4.2.1",
     "request-promise": "^4.2.6",
-    "rxjs": "6.6.2",
+    "rxjs": "7.8.1",
     "rxjs-compat": "6.6.7",
     "sails": "^1.5.4",
     "sails-hook-autoreload": "^1.1.0",