添加一些镜像

build.gradle

@@ -4,7 +4,7 @@ buildscript {
     ext.kotlin_version = '1.3.72'
     repositories {
         google()
-        //jcenter()
+        jcenter()
         maven { url 'http://maven.aliyun.com/nexus/content/groups/public/' }
         maven { url 'http://s3.amazonaws.com/fabric-artifacts/public' }
         maven { url 'https://maven.aliyun.com/repository/gradle-plugin' }
@@ -23,7 +23,7 @@ buildscript {
 allprojects {
     repositories {
         google()
-        //jcenter()
+        jcenter()
         maven { url 'http://maven.aliyun.com/nexus/content/groups/public/' }
         maven { url "https://jitpack.io" }
         maven { url 'https://maven.google.com/' }