build(deps): 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

@@ -25,7 +25,7 @@
     "@uirouter/rx": "0.6.5",
     "@uirouter/visualizer": "^7.2.1",
     "core-js": "^2.5.7",
-    "rxjs": "^6.6.3",
+    "rxjs": "^6.6.6",
     "rxjs-compat": "^6.6.3",
     "ts-helpers": "^1.1.2",
     "tslib": "^2.1.0",

yarn.lock

@@ -8600,13 +8600,20 @@ rxjs-compat@^6.6.3:
   resolved "https://registry.yarnpkg.com/rxjs-compat/-/rxjs-compat-6.6.3.tgz#141405fcee11f48718d428b99c8f01826f594e5c"
   integrity sha512-y+wUqq7bS2dG+7rH2fNMoxsDiJ32RQzFxZQE/JdtpnmEZmwLQrb1tCiItyHxdXJHXjmHnnzFscn3b6PEmORGKw==
 
-[email protected], rxjs@^6.3.3, rxjs@^6.5.3, rxjs@^6.5.4, rxjs@^6.6.0, rxjs@^6.6.3:
+[email protected]:
   version "6.6.3"
   resolved "https://registry.yarnpkg.com/rxjs/-/rxjs-6.6.3.tgz#8ca84635c4daa900c0d3967a6ee7ac60271ee552"
   integrity sha512-trsQc+xYYXZ3urjOiJOuCOa5N3jAZ3eiSpQB5hIT8zGlL2QfnHLJ2r7GMkBGuIausdJN1OneaI6gQlsqNHHmZQ==
   dependencies:
     tslib "^1.9.0"
 
+rxjs@^6.3.3, rxjs@^6.5.3, rxjs@^6.5.4, rxjs@^6.6.0, rxjs@^6.6.6:
+  version "6.6.6"
+  resolved "https://registry.yarnpkg.com/rxjs/-/rxjs-6.6.6.tgz#14d8417aa5a07c5e633995b525e1e3c0dec03b70"
+  integrity sha512-/oTwee4N4iWzAMAL9xdGKjkEHmIwupR3oXbQjCKywF1BeFohswF3vZdogbmEF6pZkOsXTzWkrZszrWpQTByYVg==
+  dependencies:
+    tslib "^1.9.0"
+
 [email protected], safe-buffer@~5.1.0, safe-buffer@~5.1.1:
   version "5.1.2"
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"