Try with snapshot check

Author: kotcrab

deploy.gradle

@@ -57,3 +57,10 @@ signing {
     useInMemoryPgpKeys(signingKey, signingPassword)
     sign publishing.publications.maven
 }
+
+nexusPublishing {
+    useStaging.set(provider {
+        def release = publishing.publications.maven
+        release.version.endsWith("-SNAPSHOT")
+    })
+}