Align dependency versions in maven pom

[canny]

au.com.dius.pact:consumer depends on au.com.dius.pact:model, but both depend on different versions of other libraries. This gives errors when I use the maven-enforcer plugin.
Please align your dependency versions so all pact libraries rely on the same versions.

https://pact.canny.io/admin/board/feature-requests/p/align-dependency-versions-in-maven-pom

[canny]

This issue has been linked to a Canny post: Align dependency versions in maven pom 🎉