feat(ios, sdks): bump firebase-ios-sdk to 8.9.0

- also includes a test bump to react-native 0.67.0-rc.2 but no one
sees that outside of the repo...

Author: mikehardy

packages/app/package.json

@@ -65,7 +65,7 @@
   },
   "sdkVersions": {
     "ios": {
-      "firebase": "8.8.0"
+      "firebase": "8.9.0"
     },
     "android": {
       "minSdk": 16,

tests/ios/Podfile

@@ -56,5 +56,7 @@ target 'testing' do
       end
       aggregate_target.user_project.save
     end
+
+    __apply_Xcode_12_5_M1_post_install_workaround(installer)
   end
 end