update RN to 0.70 (untested)

ios/Podfile

@@ -13,9 +13,13 @@ target 'app' do
 
   use_react_native!(
     :path => config[:reactNativePath],
-    # to enable hermes on iOS, change `false` to `true` and then install pods
-    :hermes_enabled => flags[:hermes_enabled],
+        # Hermes is now enabled by default. Disable by setting this flag to false.
+    # Upcoming versions of React Native may rely on get_default_flags(), but
+    # we make it explicit here to aid in the React Native upgrade process.
+    :hermes_enabled => true,
     :fabric_enabled => flags[:fabric_enabled],
+
+    :flipper_configuration => FlipperConfiguration.enabled,
     # An absolute path to your application root.
     :app_path => "#{Pod::Config.instance.installation_root}/.."
   )
@@ -25,14 +29,13 @@ target 'app' do
     # Pods for testing
   end
 
-  # Enables Flipper.
-  #
-  # Note that if you have use_frameworks! enabled, Flipper will not work and
-  # you should disable the next line.
-  #use_flipper!()
-
   post_install do |installer|
-    react_native_post_install(installer)
+    react_native_post_install(
+      installer,
+      # Set `mac_catalyst_enabled` to `true` in order to apply patches
+      # necessary for Mac Catalyst builds
+      :mac_catalyst_enabled => false
+    )
     __apply_Xcode_12_5_M1_post_install_workaround(installer)
 
     # iOS fix