Upgrade to HV 6.0.18

Signed-off-by: Yoann Rodière <yoann@hibernate.org>

Author: yrodiere

hibernate-ogm/hiking-demo/pom.xml

@@ -16,7 +16,7 @@
         <maven.compiler.target>1.8</maven.compiler.target>
 
         <org.hibernate.ogm.version>5.1.0.Final</org.hibernate.ogm.version>
-        <org.hibernate.validator.version>6.0.5.Final</org.hibernate.validator.version>
+        <org.hibernate.validator.version>6.0.18.Final</org.hibernate.validator.version>
         <!-- used to find the wildfly module dist -->
         <org.hibernate.orm.version>5.1.2.Final</org.hibernate.orm.version>
         <org.hibernate.search.version>5.6.1.Final</org.hibernate.search.version>