Updated Flyway to v6.2.3

Closes gh-83

pom.xml

@@ -122,7 +122,7 @@
 		<!-- Database -->
 		<postgresql.jdbc.version>42.2.10</postgresql.jdbc.version>
 		<hikaricp.version>3.4.2</hikaricp.version>
-		<flyway.version>6.2.2</flyway.version>
+		<flyway.version>6.2.3</flyway.version>
 
 		<!-- Persistence -->
 		<hibernate.orm.version>5.4.11.Final</hibernate.orm.version>