chore: remove jCenter in gradle build files (craftzdog#138)

Author: obdulia-losantos

android/build.gradle

@@ -2,7 +2,6 @@ buildscript {
   if (project == rootProject) {
     repositories {
       google()
-      jcenter()
       mavenCentral()
     }
 
@@ -50,13 +49,12 @@ android {
 
 repositories {
   mavenLocal()
-    maven {
-      // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
-      url("$rootDir/../node_modules/react-native/android")
-    }
+  maven {
+    // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
+    url("$rootDir/../node_modules/react-native/android")
+  }
   google()
-    mavenCentral()
-    jcenter()
+  mavenCentral()
 }
 
 dependencies {

example/android/build.gradle

@@ -11,7 +11,6 @@ buildscript {
     repositories {
         google()
         mavenCentral()
-        jcenter()
     }
     dependencies {
         classpath("com.android.tools.build:gradle:4.2.2")
@@ -39,7 +38,9 @@ allprojects {
             }
         }
         google()
-        jcenter()
-        maven { url 'https://www.jitpack.io' }
+
+        maven { url "https://maven.aliyun.com/repository/jcenter" }
+        maven { url "https://plugins.gradle.org/m2/" }
+        maven { url "https://jitpack.io" }
     }
 }