Bump rxjs-compat from 6.5.4 to 6.6.7

Bumps rxjs-compat from 6.5.4 to 6.6.7.

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

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

package.json

@@ -48,7 +48,7 @@
     "ngx-avatars": "^1.3.1",
     "ngx-file-drop": "^13.0.0",
     "rxjs": "^6.6.3",
-    "rxjs-compat": "^6.0.0-rc.0",
+    "rxjs-compat": "^6.6.7",
     "tslib": "^2.0.0",
     "typescript": "~4.6.3",
     "xliff-to-json": "^1.0.4",