Add Gravatar back (still used by WordPressAuthentificator

Package.swift

@@ -4,7 +4,7 @@ import PackageDescription
 
 let package = Package(
     name: "WordPressUI",
-    platforms: [.iOS(.v11)],
+    platforms: [.iOS(.v13)],
     products: [
         .library(name: "WordPressUI", targets: ["WordPressUI"]),
         .library(name: "WordPressUIObjC", targets: ["WordPressUIObjC"])

Sources/WordPressUI/Extensions/Gravatar/Gravatar.swift

@@ -1,4 +1,5 @@
 import Foundation
+import CryptoKit
 
 /// Helper Enum that specifies all of the available Gravatar Image Ratings
 /// TODO: Convert into a pure Swift String Enum. It's done this way to maintain ObjC Compatibility
@@ -106,7 +107,7 @@ public struct Gravatar {
         return email
             .lowercased()
             .trimmingCharacters(in: .whitespaces)
-            .sha256Hash()
+            .sha256()
     }
 }
 
@@ -146,3 +147,17 @@ public extension Gravatar {
         self.canonicalURL = sanitizedURL
     }
 }
+
+extension String {
+    func sha256() -> String {
+        guard let input = self.data(using: .utf8) else {
+            return "" // The conversion to .utf8 should never fail
+        }
+        let digest = SHA256.hash(data: input)
+        var output = ""
+        for byte in digest {
+            output.append(String(format: "%02x", byte))
+        }
+        return output
+    }
+}

Sources/WordPressUI/Extensions/UIImageView+Gravatar.swift

@@ -1,10 +1,6 @@
 import Foundation
 import UIKit
 
-#if SWIFT_PACKAGE
-import WordPressUIObjC
-#endif
-
 /// Wrapper class used to ensure removeObserver is called
 private class GravatarNotificationWrapper {
     let observer: NSObjectProtocol

Sources/WordPressUI/Extensions/UIImageView+Networking.swift

@@ -1,10 +1,6 @@
 import Foundation
 import UIKit
 
-#if SWIFT_PACKAGE
-import WordPressUIObjC
-#endif
-
 public extension UIImageView {
     enum ImageDownloadError: Error {
         case noURLSpecifiedInRequest