Require Go 1.23 and refresh golangci-lint config

[oschwald]

• Require Go 1.23 and test on 1.24
• Refresh golangci-lint config and convert to YAML

[github-actions]

Modver result

This report was generated by Modver,
a Go package and command that helps you obey semantic versioning rules in your Go module.

This PR requires (at least) an increase in your module's minor version number.

minimum Go version changed from 1.19 to 1.23
  Minor