chore(deps-dev): bump rxjs from 6.6.3 to 6.6.6

Bumps [rxjs](https://github.com/reactivex/rxjs) from 6.6.3 to 6.6.6.
- [Release notes](https://github.com/reactivex/rxjs/releases)
- [Changelog](https://github.com/ReactiveX/rxjs/blob/6.6.6/CHANGELOG.md)
- [Commits](ReactiveX/rxjs@6.6.3...6.6.6)

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

Author: dependabot-preview[bot]

package.json

@@ -81,7 +81,7 @@
     "nyc": "^15.1.0",
     "prettier": "^2.2.1",
     "raw-loader": "^4.0.2",
-    "rxjs": "^6.6.3",
+    "rxjs": "^6.6.6",
     "shelljs": "^0.8.4",
     "shx": "^0.3.3",
     "sinon": "^9.2.4",

yarn.lock

@@ -5487,10 +5487,10 @@ run-queue@^1.0.0, run-queue@^1.0.3:
   dependencies:
     aproba "^1.1.1"
 
-rxjs@^6.6.3:
-  version "6.6.3"
-  resolved "https://registry.npmjs.org/rxjs/-/rxjs-6.6.3.tgz#8ca84635c4daa900c0d3967a6ee7ac60271ee552"
-  integrity sha512-trsQc+xYYXZ3urjOiJOuCOa5N3jAZ3eiSpQB5hIT8zGlL2QfnHLJ2r7GMkBGuIausdJN1OneaI6gQlsqNHHmZQ==
+rxjs@^6.6.3, rxjs@^6.6.6:
+  version "6.6.6"
+  resolved "https://registry.npmjs.org/rxjs/-/rxjs-6.6.6.tgz#14d8417aa5a07c5e633995b525e1e3c0dec03b70"
+  integrity sha512-/oTwee4N4iWzAMAL9xdGKjkEHmIwupR3oXbQjCKywF1BeFohswF3vZdogbmEF6pZkOsXTzWkrZszrWpQTByYVg==
   dependencies:
     tslib "^1.9.0"