Adding mavenCentral() as jcenter() is shutting (#279)

* Adding mavenCentral() as jcenter() is shutting done

* jcenter() removed

Author: maheshwarimrinal

src/android/build.gradle

@@ -1,7 +1,7 @@
 buildscript {
   repositories {
+    mavenCentral()
     google()
-    jcenter()
   }
 
   dependencies {
@@ -31,11 +31,10 @@ android {
 
 repositories {
   google()
-  jcenter()
   mavenCentral()
 }
 
 dependencies {
   //noinspection GradleDynamicVersion
   api 'com.facebook.react:react-native:+'
-}
+}