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Fixes problem with toString() calling lazy collection

Major release with three important changes

1. JDK 12 -> JDK 17
2. Removal of Akka dependency, replacing it with a more standard spring-based approach to fetch blogs and blog posts
3. Many dependencies bumped to latest or at least pretty recent versions

Adds banner for GeeCON 2022 conference in Cracow

Release with soft-skills banner