build.gradle

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

buildscript { 
    ext.kotlin_version = '1.3.31'

    repositories {
        google()
        jcenter()

        maven {
            url 'https://maven.fabric.io/public'
        }
        
    }

    dependencies {
        classpath 'com.google.gms:google-services:4.2.0'
        classpath 'com.android.tools.build:gradle:3.5.0'
        classpath 'io.fabric.tools:gradle:1.28.1'
        
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" }
}

allprojects {
    repositories {
        google()
        jcenter()
        maven { url "https://jitpack.io"}
        maven {
            url 'https://maven.fabric.io/public'
        }
    }
}

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