chore(deps): update dependency rxjs to v6.5.3 (#835)

Author: renovate[bot]

docs/package.json

@@ -18,7 +18,7 @@
     "@angular/core": "8.2.8",
     "codelyzer": "5.1.2",
     "codemirror": "5.49.0",
-    "rxjs": "5.5.12",
+    "rxjs": "6.5.3",
     "tslint": "5.20.0",
     "typescript": "2.9.2",
     "uglifyjs": "2.4.11",

package-lock.json

@@ -84,7 +84,7 @@
     "node-sass": "4.12.0",
     "prettier": "1.17.0",
     "rimraf": "3.0.0",
-    "rxjs": "6.5.1",
+    "rxjs": "6.5.3",
     "standard-version": "7.0.0",
     "ts-node": "8.4.1",
     "tslint": "5.20.0",