update cocoapod spec

RNGL.podspec

 Pod::Spec.new do |s|
 
   s.name         = "RNGL"
-  s.version      = "2.26.0"
+  s.version      = "2.28.2"
+  s.author       = "Gaëtan Renaudeau"
+  s.summary      = "OpenGL bindings for React Native to implement complex effects over images and components"
   s.homepage     = "https://github.com/ProjectSeptemberInc/gl-react-native"
   s.platform     = :ios, "8.0"
-  s.source       = { :git => "https://github.com/ProjectSeptemberInc/gl-react-native.git" }
-  s.source_files = 'ios/*.{h,m}'
+  s.source       = { :git => "https://github.com/ProjectSeptemberInc/gl-react-native.git", :tag => "v2.28.2" }
+  s.source_files = "ios/*.{h,m}"
+  s.license      = "MIT"
 
 end