Merge pull request #7 from Radweb/fix/sdk-version

Bump android sdk version

Author: iWader

android/build.gradle

@@ -14,12 +14,12 @@ apply plugin: 'idea'
 apply plugin: 'com.android.library'
 
 android {
-	compileSdkVersion 28
-	buildToolsVersion "28.0.3"
+	compileSdkVersion 31
+	buildToolsVersion "31.0.0"
 
 	defaultConfig {
 		minSdkVersion 21
-		targetSdkVersion 28
+		targetSdkVersion 31
 		versionCode 1
 		versionName "1.0"
 	}