Add xcode 12.4

Author: native-api

_data/xcodes.yml

@@ -1,4 +1,59 @@
 osx_images:
+  - image: xcode12.4
+    xcode: "12.4"
+    osx_version: "11.2.1"
+    xcode_full_version: "12.4"
+    xcode_build_version: "12D4e"
+    image_publish_date: 2021-02-26
+    sdks:
+      - iphoneos14.4
+      - iphonesimulator14.4
+      - driverkit.macosx20.2
+      - macosx11.1
+      - appletvos14.3
+      - appletvsimulator14.3
+      - watchos7.2
+      - watchsimulator7.2
+    simulators:
+      - iOS 11.4
+      - iOS 12.0
+      - iOS 12.1
+      - iOS 12.2
+      - iOS 12.4
+      - iOS 13.0
+      - iOS 13.1
+      - iOS 13.2
+      - iOS 13.3
+      - iOS 13.4
+      - iOS 13.5
+      - iOS 13.6
+      - iOS 13.7
+      - iOS 14.0
+      - iOS 14.1
+      - iOS 14.2
+      - iOS 14.3
+      - iOS 14.4
+      - tvOS 11.4
+      - tvOS 12.0
+      - tvOS 12.1
+      - tvOS 12.2
+      - tvOS 12.4
+      - tvOS 13.0
+      - tvOS 13.2
+      - tvOS 13.3
+      - tvOS 13.4
+      - tvOS 14.0
+      - tvOS 14.2
+      - tvOS 14.3
+      - watchOS 5.0 
+      - watchOS 5.1
+      - watchOS 5.2
+      - watchOS 5.3
+      - watchOS 6.1
+      - watchOS 6.2
+      - watchOS 7.0  
+      - watchOS 7.1  
+    jdk: "15.0.1"
   - image: xcode12.2
     xcode: "12.2"
     osx_version: "10.15.7"