Update to new Sonatype host (#406)

Following steps in https://github.com/vanniktech/gradle-maven-publish-plugin#where-to-upload-to for pointing to the new host.

build.gradle

@@ -58,3 +58,11 @@ subprojects {
         }
     }
 }
+
+allprojects {
+    plugins.withId("com.vanniktech.maven.publish") {
+        mavenPublish {
+            sonatypeHost = "S01"
+        }
+    }
+}