Migrate to open source firebase-crashlytics

build.gradle

@@ -7,15 +7,12 @@ buildscript {
     repositories {
         google()
         jcenter()
-        maven {
-            url 'https://maven.fabric.io/public'
-        }
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:4.0.0-alpha09'
         classpath 'com.github.ben-manes:gradle-versions-plugin:0.27.0'
+        classpath 'com.google.firebase:firebase-crashlytics-gradle:2.0.0-beta01'
         classpath 'com.google.gms:google-services:4.3.3'
-        classpath 'io.fabric.tools:gradle:1.31.2'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion"
     }
 }