build.gradle

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

buildscript { 
    ext.kotlin_version = '1.4.10'

    
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.5.4'
        classpath 'com.google.gms:google-services:4.3.4'

        // 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://raw.github.com/synergian/wagon-git/releases"}
    }
}

//add the folllowing lines to force libs to use recent buildtools
subprojects {
    afterEvaluate {
        project ->
            if (project.hasProperty("android")) {
                android {
                    compileSdkVersion = 28
                    buildToolsVersion = "28.0.3"
                }
            }
    }
}


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