Fix publishing for 0.5.0

Summary:
Publishing on fbjni 0.5.0 just failed as the `publish` task is missing when applying the `host.gradle` file.
This fixes it.

Reviewed By: passy

Differential Revision: D47664137

fbshipit-source-id: 0906a0ca4c77897427d71c2e62c0b9888e634e70

host.gradle

@@ -16,7 +16,8 @@
 
 plugins {
     id 'java-library'
-    id 'com.vanniktech.maven.publish' version '0.18.0' apply false
+    id 'maven-publish'
+    id 'com.vanniktech.maven.publish' version '0.25.2' apply false
 }
 
 repositories {