build.gradle

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

buildscript {
    ext.kotlin_version = '1.3.72'
    ext.anko_version = '0.10.4'
    ext.android_plugin_version = '2.2.0-alpha4'

    repositories {
        google()
        jcenter()
		maven { url 'https://plugins.gradle.org/m2/'}
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:4.0.1'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
		classpath 'com.google.gms:google-services:4.3.3'
        classpath 'gradle.plugin.com.onesignal:onesignal-gradle-plugin:[0.12.8, 0.99.99]'

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

allprojects {
    repositories {
        google()
        jcenter()

        mavenCentral()
        maven { url "https://jitpack.io" }
    }
}

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