added Nullablity annotations and updated podspec

Author: sla8c

Pod/Classes/WPMediaPickerAlertHelper.h

@@ -2,6 +2,7 @@
 
 @interface WPMediaPickerAlertHelper : NSObject
 
-+ (UIAlertController *)buildAlertControllerWithError:(NSError *)error okActionHandler:(void (^ __nullable)(UIAlertAction *action))handler;
++ (nonnull UIAlertController *)buildAlertControllerWithError:(NSError * _Nullable)error
+                                             okActionHandler:(void (^ __nullable)(UIAlertAction * _Nullable action))handler;
 
 @end

Pod/Classes/WPMediaPickerAlertHelper.m

@@ -3,7 +3,8 @@
 
 @implementation WPMediaPickerAlertHelper
 
-+ (UIAlertController *)buildAlertControllerWithError:(NSError *)error okActionHandler:(void (^ __nullable)(UIAlertAction *action))handler {
++ (nonnull UIAlertController *)buildAlertControllerWithError:(NSError * _Nullable)error
+                                             okActionHandler:(void (^ __nullable)(UIAlertAction * _Nullable action))handler {
     NSString *title = NSLocalizedString(@"Media Library", @"Title for alert when a generic error happened when loading media");
     NSString *message = NSLocalizedString(@"There was a problem when trying to access your media. Please try again later.",  @"Explaining to the user there was an generic error accesing media.");
     NSString *cancelText = NSLocalizedString(@"OK", "");

WPMediaPicker.podspec

@@ -2,7 +2,7 @@
 
 Pod::Spec.new do |s|
   s.name          = 'WPMediaPicker'
-  s.version       = '1.8.3-beta.2'
+  s.version       = '1.8.3-beta.3'
 
   s.summary       = 'WPMediaPicker is an iOS controller that allows capture and picking of media assets.'
   s.description   = <<-DESC