Update dependency rxjs to v6.6.2

Author: renovate-bot

docs/package.json

@@ -18,7 +18,7 @@
     "@angular/core": "8.2.11",
     "codelyzer": "5.1.2",
     "codemirror": "5.51.0",
-    "rxjs": "6.5.3",
+    "rxjs": "6.6.2",
     "tslint": "5.20.0",
     "typescript": "3.8.2",
     "uglifyjs": "2.4.11",

package.json

@@ -82,7 +82,7 @@
     "node-sass": "4.13.0",
     "prettier": "1.19.1",
     "rimraf": "3.0.0",
-    "rxjs": "6.5.3",
+    "rxjs": "6.6.2",
     "standard-version": "7.1.0",
     "ts-node": "8.5.4",
     "tslint": "5.20.0",