build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    repositories {
        google()
        mavenCentral()
        gradlePluginPortal()
        maven {
            url 'https://jitpack.io'
        }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:7.0.2'
        classpath 'com.google.gms:google-services:4.3.10'
        classpath 'gradle.plugin.com.onesignal:onesignal-gradle-plugin:0.13.4'
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        mavenCentral()
        maven {
            url 'https://jitpack.io'
        }
        maven {
            url 'https://startappdev.bintray.com/maven'
        }
    }
}

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