Upgraded to GraphQL Java 14.0
Closes
<!--
Update these properties in the vertx-lang-* modules too
-->
- <graphql.java.major.version>13</graphql.java.major.version>
+ <graphql.java.major.version>14</graphql.java.major.version>
<graphql.java.version>${graphql.java.major.version}.0</graphql.java.version>
<doc.skip>false</doc.skip>
</properties>
