build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    repositories {
        google()
        jcenter()
        gradlePluginPortal()
        mavenCentral()
        maven { url "https://www.jitpack.io" }
    }
    dependencies {


        classpath "com.android.tools.build:gradle:4.1.1"
        //google services
        classpath 'com.google.gms:google-services:4.3.5'

        //one signal
        classpath 'gradle.plugin.com.onesignal:onesignal-gradle-plugin:[0.12.9, 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://www.jitpack.io" }
    }
}

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