Upgraded gradle plugin and updated to target APK30 for Google Play Store

app/build.gradle

@@ -1,13 +1,13 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 29
+    compileSdkVersion 30
     useLibrary 'org.apache.http.legacy'
 
     defaultConfig {
         applicationId "uk.org.openseizuredetector"
         minSdkVersion 24
-        targetSdkVersion 29
+        targetSdkVersion 30
         multiDexEnabled true
     }
 
@@ -28,7 +28,6 @@ android {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
-    buildToolsVersion '29.0.2'
 }
 
 dependencies {

app/release/output.json

@@ -1 +0,0 @@
-[{"outputType":{"type":"APK"},"apkData":{"type":"MAIN","splits":[],"versionCode":72,"versionName":"3.5.0","enabled":true,"outputFile":"app-release.apk","fullName":"release","baseName":"release","dirName":""},"path":"app-release.apk","properties":{}}]