Update dependencies including to the Kubernetes Java Client 13

[rjeberhard]

Updated dependencies and plugins to latest versions.

Notes:

• The latest version of Checkstyle had a non backward-compatible change to a property name
• Used "--add-opens java.base/java.time=ALL-UNNAMED" in place of "--illegal-access=permit" because the later is deprecated and the former is more specific -- the issue you would see without either of these options is that the serialization libraries could not access the fields of OffsetDateTime, which is in the java.time module.
• The CRDHelper has a utility method to output (serialize) the schema as YAML. This needed some code that I found in the Kubernetes client to properly wrap the constructors so that it would work with the SnakeYAML library.

[lennyphan]

LGTM