Update UnCiv to 3.8.4 (421)

metadata/com.unciv.app.yml

@@ -378,9 +378,19 @@ Builds:
       - desktop
     prebuild: sed -i -e '/maven.aliyun.com/d' ../build.gradle
 
+  - versionName: 3.8.4
+    versionCode: 421
+    commit: 3.8.4
+    subdir: android
+    gradle:
+      - yes
+    rm:
+      - desktop
+    prebuild: sed -i -e '/maven.aliyun.com/d' ../build.gradle
+
 AutoUpdateMode: Version %v
 UpdateCheckMode: HTTP
 UpdateCheckData: https://raw.githubusercontent.com/yairm210/Unciv/master/build.gradle|appCodeNumber
     = (.*)|.|appVersion = "(.*)"
-CurrentVersion: 3.8.1-patch1
-CurrentVersionCode: 418
+CurrentVersion: 3.8.4
+CurrentVersionCode: 421