Use ObjectivePGP if Gopenpgp fails

Podfile

@@ -0,0 +1,25 @@
+platform :ios, '10.2'
+use_frameworks!
+
+target 'passKit' do
+    pod 'ObjectivePGP', :git => 'https://github.com/krzyzanowskim/ObjectivePGP.git', :tag => '0.14.0'
+    target 'pass' do
+        inherit! :search_paths
+    end
+    target 'passExtension' do
+        inherit! :search_paths
+    end
+    target 'passKitTests' do
+        inherit! :search_paths
+    end
+end
+
+post_install do |installer|
+  installer.pods_project.targets.each do |target|
+    target.build_configurations.each do |config|
+      cflags = config.build_settings['OTHER_CFLAGS'] || ['$(inherited)']
+      cflags << '-fembed-bitcode'
+      config.build_settings['OTHER_CFLAGS'] = cflags
+    end
+  end
+end