Added Jitpack and updated version

[maven-scm] copy for tag flyway-6.0.3

[maven-scm] copy for tag flyway-6.0.2

[maven-scm] copy for tag flyway-6.0.1

[maven-scm] copy for tag flyway-6.0.0

[maven-scm] copy for tag flyway-6.0.0-beta2

[maven-scm] copy for tag flyway-6.0.0-beta

[maven-scm] copy for tag flyway-5.2.4

[maven-scm] copy for tag flyway-5.2.3

[maven-scm] copy for tag flyway-5.2.2