build.gradle

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

buildscript {
    ext.kotlin_version = '1.3.61'
    ext.retrofitVersion = "2.5.0"
    ext.lifecycle_version = "2.1.0-rc01"
    ext.room_version = "2.1.0-rc01"
    ext.lifecycle_version = "2.1.0-rc01"
    repositories {
        maven { url 'https://maven.fabric.io/public' }
        maven { url "http://download.crashlytics.com/maven" }
        maven {
            url 'https://maven.google.com/'
            name 'Google'
        }
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:4.0.2'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        maven {
            url 'https://maven.google.com/'
            name 'Google'
        }
    }
}

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