bump tns-android to fix a jcenter() library issue

Author: EddyVerbruggen

demo-ng/package.json

@@ -6,7 +6,7 @@
   "nativescript": {
     "id": "org.nativescript.firebasedemo.firestore",
     "tns-android": {
-      "version": "4.1.1"
+      "version": "4.1.3"
     },
     "tns-ios": {
       "version": "4.1.0"