[Update] png (1.6.39.4)

Author: Anka

png/1.6.39.4/png.podspec

@@ -0,0 +1,19 @@
+Pod::Spec.new do |s|
+  s.name         = "png"
+  s.version      = "1.6.39.4"
+  s.summary      = "portable network graphics library."
+  s.homepage     = "https://github.com/cppfw/#{s.name}"
+  s.license      = { :file => 'LICENSE' }
+  s.author       = { "Ivan Gagis" => "igagis@gmail.com" }
+  s.platform     = :ios
+  s.ios.deployment_target = '9.0'
+
+  s.source = { :http => "http://gagis.hopto.org/repo/cppfw/cocoapods/#{s.name}-#{s.version}.zip" }
+
+  s.source_files  = "include/**/*.{hpp,h}"
+  s.header_mappings_dir = "include"
+
+  s.ios.vendored_framework = "lib/ios/#{s.name}.xcframework"
+
+  s.dependency 'zlib', '>= 1.2.11.9'
+end