build.gradle

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

buildscript {
    ext {
        buildToolsVersion = "29.0.2"
        minSdkVersion = 21
        compileSdkVersion = 29
        targetSdkVersion = 29
        googlePlayServicesAuthVersion = "18.0.0" 
    }
    repositories {
        google()
        jcenter()
        mavenCentral()
    }
    dependencies {
        classpath("com.android.tools.build:gradle:3.5.3")
        
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
          classpath 'com.google.gms:google-services:4.3.5'
          classpath 'com.google.firebase:firebase-crashlytics-gradle:2.5.1'
    }
}

allprojects {
    repositories {
        mavenLocal()
        
        maven {
            // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
            url("$rootDir/../node_modules/react-native/android")
        }
        maven {
            // Android JSC is installed from npm
            url("$rootDir/../node_modules/jsc-android/dist")
        }
        google()
       jcenter()
        mavenCentral() 
        maven { url "https://www.jitpack.io" }
    }
}