Update deployment target to osx 10.13 to handle GH runner update

PiperOrigin-RevId: 667985442

Protobuf.podspec

@@ -45,7 +45,7 @@ Pod::Spec.new do |s|
   s.pod_target_xcconfig = { 'GCC_PREPROCESSOR_DEFINITIONS' => '$(inherited) GPB_USE_PROTOBUF_FRAMEWORK_IMPORTS=1' }
 
   s.ios.deployment_target = '10.0'
-  s.osx.deployment_target = '10.12'
+  s.osx.deployment_target = '10.13'
   s.tvos.deployment_target = '12.0'
   s.watchos.deployment_target = '6.0'
   s.visionos.deployment_target = '1.0'

objectivec/ProtocolBuffers_OSX.xcodeproj/project.pbxproj

@@ -997,7 +997,7 @@
 				GCC_WARN_UNUSED_PARAMETER = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				GENERATE_PROFILING_CODE = NO;
-				MACOSX_DEPLOYMENT_TARGET = 10.12;
+				MACOSX_DEPLOYMENT_TARGET = 10.13;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = macosx;
 				USE_HEADERMAP = NO;