Bump rxjs from 6.6.0 to 6.6.2 (#1569)

Bumps [rxjs](https://github.com/reactivex/rxjs) from 6.6.0 to 6.6.2.
- [Release notes](https://github.com/reactivex/rxjs/releases)
- [Changelog](https://github.com/ReactiveX/rxjs/blob/6.6.2/CHANGELOG.md)
- [Commits](https://github.com/reactivex/rxjs/compare/6.6.0...6.6.2)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -61,7 +61,7 @@
     "moment": "^2.27.0",
     "moment-es6": "1.0.0",
     "pdfjs-dist": "2.4.456",
-    "rxjs": "^6.6.0",
+    "rxjs": "^6.6.2",
     "tslib": "^2.0.0",
     "zone.js": "~0.10.2"
   },