auto increase build_number for testflight

ios/fastlane/Fastfile

@@ -47,19 +47,26 @@ platform :ios do
   end
 
   desc "Description of what the lane does"
-    lane :deployToTestFlight do
+    lane :deployToTestFlight do |options|
+      skip_build_number_increase = options[:skip_build_number_increase] # optional, if not set, it gets the last from TestFlight then adds + 1
+      app_store_connect_api_key(
+          key_id: APP_STORE_API_KEY_ID,
+          issuer_id: APP_STORE_API_KEY_ISSUER_ID,
+          key_filepath: APP_STORE_API_KEY_FILE,
+          is_key_content_base64: false,
+          in_house: false  # optional but may be required if using match/sigh
+      )
+
+      if skip_build_number_increase.nil?
+        increment_build_number({
+            build_number: latest_testflight_build_number(app_identifier: APP_IDENTIFIER) + 1
+        })
+      end
+
       setupCodeSigning()
       ipa_name = "Release.ipa"
       buildReleaseIPA(ipa_name: ipa_name, method: "app-store")
 
-      app_store_connect_api_key(
-         key_id: APP_STORE_API_KEY_ID,
-         issuer_id: APP_STORE_API_KEY_ISSUER_ID,
-         key_filepath: APP_STORE_API_KEY_FILE,
-         is_key_content_base64: false,
-       	 in_house: false  # optional but may be required if using match/sigh
-      )
-
       upload_to_testflight(
           skip_submission: true,
           ipa: "./builds/#{ipa_name}",