v7.2.0

This is a release with some new features and internal changes! :)

• wampy-cryptosign plugin, which was a separate repo/package, is now part of the main repo/package and is available out of the box; just import it.
• Same goes for wampy-cra plugin, which was a separate repo/package, is now part of the main repo/package and is available out of the box; just import it.
• Support for Event Retention Feature.
• Support for custom options. Thnx @vovchisko for the implementation.