add maven central snapshot repo

Author: riccardobl

build.gradle

@@ -28,6 +28,13 @@ allprojects {
     repositories {
         mavenLocal()
         mavenCentral()
+        maven {
+            name = 'CentralSnapshots'
+            url = uri('https://central.sonatype.com/repository/maven-snapshots/')
+            mavenContent {
+                snapshotsOnly()
+            }
+        }
         google()
     }
     tasks.withType(Jar) {