chore(project): update top level build gradle file

build.gradle

@@ -3,12 +3,11 @@
 buildscript {
     repositories {
         jcenter()
-        maven { url "https://maven.google.com" }
+        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.1'
-        // classpath "com.github.dcendents:android-maven-gradle-plugin:1.4.1"
-        classpath 'com.google.gms:google-services:3.1.1'
+        classpath 'com.android.tools.build:gradle:3.2.1'
+        classpath 'com.google.gms:google-services:4.0.1'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
@@ -17,9 +16,12 @@ buildscript {
 
 allprojects {
     repositories {
+        google()
         jcenter()
-        maven { url "https://jitpack.io" }
         maven { url "https://maven.google.com" }
+        flatDir {
+            dirs 'libs'
+        }
     }
 }