Update podspec to include XPC Services and use https (sparkle-project…

…#1935)

Sparkle.podspec

@@ -3,9 +3,9 @@ Pod::Spec.new do |s|
   s.version     = "2.0.0-beta.1"
   s.summary     = "A software update framework for macOS"
   s.description = "Sparkle is an easy-to-use software update framework for Cocoa developers."
-  s.homepage    = "http://sparkle-project.org"
-  s.documentation_url = "http://sparkle-project.org/documentation/"
-  s.screenshot  = "http://sparkle-project.org/images/[email protected]"
+  s.homepage    = "https://sparkle-project.org"
+  s.documentation_url = "https://sparkle-project.org/documentation/"
+  s.screenshot  = "https://sparkle-project.org/images/[email protected]"
   s.license     = {
     :type => 'MIT',
     :file => 'LICENSE'
@@ -22,7 +22,7 @@ Pod::Spec.new do |s|
   s.source   = { :http => "https://github.com/sparkle-project/Sparkle/releases/download/#{s.version}/Sparkle-#{s.version}.tar.bz2" }
   s.source_files = 'Sparkle.framework/Versions/A/Headers/*.h'
 
-  s.preserve_paths = 'bin/*'
+  s.preserve_paths = ['bin/*', 'XPCServices/*']
   s.public_header_files = 'Sparkle.framework/Versions/A/Headers/*.h'
   s.vendored_frameworks  = 'Sparkle.framework'
   s.xcconfig            = {