Use Sonatype staging repository for publishing

Author: wiktor-k

build.gradle

@@ -72,7 +72,8 @@ publishing {
     }
     repositories {
         maven {
-            url "file:/${project.projectDir}/artifacts"
+            name 'sonatypeStaging'
+            url 'https://oss.sonatype.org/service/local/staging/deploy/maven2/'
         }
     }
 }