Fix some gradle deprecations

app/build.gradle

@@ -8,14 +8,14 @@ plugins {
 }
 
 android {
-    compileSdkVersion 30
+    compileSdk 30
     buildToolsVersion '30.0.3'
 
     defaultConfig {
         applicationId "org.schabi.newpipe"
         resValue "string", "app_name", "NewPipe"
-        minSdkVersion 19
-        targetSdkVersion 29
+        minSdk 19
+        targetSdk 29
         versionCode 981
         versionName "0.21.15"
 
@@ -65,7 +65,7 @@ android {
         }
     }
 
-    lintOptions {
+    lint {
         checkReleaseBuilds false
         // Or, if you prefer, you can continue to check for errors in release builds,
         // but continue the build even when errors are found:
@@ -98,7 +98,7 @@ android {
 }
 
 ext {
-    checkstyleVersion = '9.2'
+    checkstyleVersion = '9.2.1'
 
     androidxLifecycleVersion = '2.3.1'
     androidxRoomVersion = '2.3.0'