[#1245] Build using latest Vert.x snapshot plus Oracle

Author: DavideD

.github/workflows/tracking-vertx-4.build.yml

@@ -87,7 +87,7 @@ jobs:
     strategy:
       matrix:
         vertx-version: [ '[4.2,4.3)' ]
-        db: [ 'MariaDB', 'MySQL', 'PostgreSQL', 'DB2', 'CockroachDB', 'MSSQLServer' ]
+        db: [ 'MariaDB', 'MySQL', 'PostgreSQL', 'DB2', 'CockroachDB', 'MSSQLServer', 'Oracle' ]
     steps:
       - uses: actions/checkout@v2
       - name: Set up JDK 11