Revert "chore(deps): Bump snakeyaml and kafka"

[timonback]

This reverts commit 8cf45d4

Reason:

• These dependency should be upgraded by the spring (in their versions file) or by the user
  • Source: https://docs.spring.io/spring-boot/docs/current/reference/html/dependency-versions.html
• The versions appear in our pom.xml, which might not be ideal for a library to enfore this on our users

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