fix(deps): update dependency rxjs to v6.6.3

Author: renovate-bot

package-lock.json

@@ -37,7 +37,7 @@
     "ngx-perfect-scrollbar": "10.0.1",
     "nodemon": "2.0.4",
     "prismjs": "1.21.0",
-    "rxjs": "6.6.2",
+    "rxjs": "6.6.3",
     "rxjs-compat": "6.6.3",
     "tslib": "2.0.1",
     "zone.js": "0.11.1"