self-contained build.gradle for using NullAway on an Android app

nullaway-build.gradle

buildscript {
    repositories {
      jcenter()
      maven {
         url "https://plugins.gradle.org/m2/"
      }
      // for android gradle plugin 3
      google()
    }
    dependencies {
        classpath "com.android.tools.build:gradle:3.0.1"
        classpath "net.ltgt.gradle:gradle-errorprone-plugin:1.2.1"
    }
}

apply plugin: 'com.android.application'
apply plugin: 'net.ltgt.errorprone'

android {
    compileSdkVersion 27
    buildToolsVersion "27.0.2"

    defaultConfig {
        applicationId "com.uber.myapplication"
        minSdkVersion 16
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_7
        targetCompatibility JavaVersion.VERSION_1_7
    }

    lintOptions {
        abortOnError false
    }
}

dependencies {
    compile "com.android.support:appcompat-v7:27.0.2"

    testCompile "junit:junit:4.12"

    annotationProcessor "com.uber.nullaway:nullaway:0.9.1"

    errorprone "com.google.errorprone:error_prone_core:2.4.0"
    errorproneJavac "com.google.errorprone:javac:9+181-r4173-1"
}

tasks.withType(JavaCompile) {
  // remove the if condition if you want to run NullAway on test code
  if (!name.toLowerCase().contains("test")) {
    // remove "-Xep:NullAway:ERROR" to have NullAway only emit warnings
    options.compilerArgs += ["-Xep:NullAway:ERROR", "-XepOpt:NullAway:AnnotatedPackages=com.uber"]
  }
}

Is this up-to-date? Wondering why we use 0.3.0 in this example but readme shows latest as 0.6.6.