Fixes UIActivityIndicatorView.style deprecation warnings

AltStore/Authentication/AuthenticationViewController.swift

@@ -31,7 +31,8 @@ class AuthenticationViewController: UIViewController
     {
         super.viewDidLoad()
         
-        self.signInButton.activityIndicatorView.style = .white
+        self.signInButton.activityIndicatorView.style = .medium
+        self.signInButton.activityIndicatorView.color = .white
         
         for view in [self.appleIDBackgroundView!, self.passwordBackgroundView!, self.signInButton!]
         {

AltStore/Browse/BrowseViewController.swift

@@ -94,7 +94,8 @@ private extension BrowseViewController
             cell.bannerView.iconImageView.isIndicatingActivity = true
             
             cell.bannerView.button.addTarget(self, action: #selector(BrowseViewController.performAppAction(_:)), for: .primaryActionTriggered)
-            cell.bannerView.button.activityIndicatorView.style = .white
+            cell.bannerView.button.activityIndicatorView.style = .medium
+            cell.bannerView.button.activityIndicatorView.color = .white
             
             // Explicitly set to false to ensure we're starting from a non-activity indicating state.
             // Otherwise, cell reuse can mess up some cached values.

AltStore/Components/PillButton.swift

@@ -88,7 +88,8 @@ class PillButton: UIButton
         self.layer.masksToBounds = true
         self.accessibilityTraits.formUnion([.updatesFrequently, .button])
         
-        self.activityIndicatorView.style = .white
+        self.activityIndicatorView.style = .medium
+        self.activityIndicatorView.color = .white
         self.activityIndicatorView.isUserInteractionEnabled = false
         
         self.progressView.progress = 0

AltStore/Settings/PatreonComponents.swift

@@ -40,7 +40,8 @@ class PatronsFooterView: UICollectionReusableView
         super.init(frame: frame)
         
         self.button.translatesAutoresizingMaskIntoConstraints = false
-        self.button.activityIndicatorView.style = .white
+        self.button.activityIndicatorView.style = .medium
+        self.button.activityIndicatorView.color = .white
         self.button.titleLabel?.textColor = .white
         self.addSubview(self.button)