test(emulator): port numbers as numbers not strings

quiets some firebase emulator startup warnings

Author: mikehardy

.github/workflows/scripts/firebase.json

@@ -18,19 +18,19 @@
   },
   "emulators": {
     "auth": {
-      "port": "9099"
+      "port": 9099
     },
     "database": {
-      "port": "9000"
+      "port": 9000
     },
     "firestore": {
-      "port": "8080"
+      "port": 8080
     },
     "functions": {
-      "port": "5001"
+      "port": 5001
     },
     "storage": {
-      "port": "9199"
+      "port": 9199
     },
     "ui": {
       "enabled": true