Update dependency rxjs to ^6.6.6

Author: renovate-bot

package.json

@@ -71,7 +71,7 @@
     "prom-client": "^12.0.0",
     "relateurl": "^0.2.7",
     "rmfr": "^2.0.0",
-    "rxjs": "^6.5.4",
+    "rxjs": "^6.6.6",
     "semver": "^7.1.3",
     "source-map": "^0.7.3",
     "source-map-support": "^0.5.16",

yarn.lock

@@ -6297,10 +6297,10 @@ rxjs-tslint-rules@^4.23.0:
     tsutils "^3.0.0"
     tsutils-etc "^1.1.0"
 
-rxjs@^6.5.4:
-  version "6.5.4"
-  resolved "https://registry.npmjs.org/rxjs/-/rxjs-6.5.4.tgz#e0777fe0d184cec7872df147f303572d414e211c"
-  integrity sha512-naMQXcgEo3csAEGvw/NydRA0fuS2nDZJiw1YUWFKU7aPPAPGZEsD4Iimit96qwCieH6y614MCLYwdkrWx7z/7Q==
+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"