build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    ext {
        kotlin_version = '1.2.71'
        rxJava_version = "2.1.13"
        dagger2_version = "2.15"
    }
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.google.gms:google-services:4.1.0'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }

    project.ext {
        myMinSdkVersion = 19
        myTargetSdkVersion = 27
        myCompileSdkVersion = 27
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}