io.vertx vertx-ext-parent 34 pom 4.0.0 vertx-mysql-postgresql-client-parent 3.8.0 Vert.x MySQL/PostgreSQL Client Parent 3.8.0 true spring-repo Spring Repository https://repo.spring.io/libs-milestone jcenter https://jcenter.bintray.com/ io.vertx vertx-dependencies ${stack.version} pom import vertx-mysql-postgresql-client-jasync vertx-mysql-postgresql-client-scala