Update project for Xcode 12.5

Example/HTMLKitExample/HTMLKitExample.xcodeproj/project.pbxproj

@@ -242,7 +242,7 @@
 			buildSettings = {
 				CODE_SIGN_IDENTITY = "-";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};
@@ -251,7 +251,7 @@
 			buildSettings = {
 				CODE_SIGN_IDENTITY = "-";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
 		};