build: RxJS updated to 6.3 (#26087)

PR Close #26087

aio/package.json

@@ -86,7 +86,7 @@
     "@webcomponents/custom-elements": "^1.2.0",
     "classlist.js": "^1.1.20150312",
     "core-js": "^2.4.1",
-    "rxjs": "6.2.2",
+    "rxjs": "^6.3.0",
     "tslib": "^1.9.0",
     "web-animations-js": "^2.2.5",
     "zone.js": "^0.8.26"

aio/tools/examples/shared/package.json

@@ -35,7 +35,7 @@
     "angular-in-memory-web-api": "^0.6.0",
     "core-js": "^2.5.4",
     "express": "^4.14.1",
-    "rxjs": "^6.0.0",
+    "rxjs": "^6.3.0",
     "systemjs": "0.19.39",
     "web-animations-js": "^2.3.1",
     "zone.js": "^0.8.24"