Added CocoaPods support for visionOS

Author: dreampiggy

Diff for: libwebp.podspec

@@ -14,6 +14,7 @@ Pod::Spec.new do |s|
   s.ios.deployment_target = '9.0'
   s.tvos.deployment_target = '9.0'
   s.watchos.deployment_target = '2.0'
+  s.visionos.deployment_target = '1.0'
 
   s.pod_target_xcconfig = {
     'USER_HEADER_SEARCH_PATHS' => '$(inherited) ${PODS_ROOT}/libwebp/ ${PODS_TARGET_SRCROOT}/'