Merge pull request #542 from ChangJoo-Park/patch-1

docs: compileSdkVersion 28 to 30

permission_handler/README.md

@@ -28,10 +28,10 @@ The TL;DR version is:
 android.useAndroidX=true
 android.useAndroidX=true
 android.enableJetifier=true
 android.enableJetifier=true
 ```
 ```
-2. Make sure you set the `compileSdkVersion` in your "android/app/build.gradle" file to 28:
+2. Make sure you set the `compileSdkVersion` in your "android/app/build.gradle" file to 30:
 ```
 ```
 android {
 android {
-  compileSdkVersion 28
+  compileSdkVersion 30
   ...
   ...
 }
 }
 ```
 ```