Release Metafacture core 6.2.0

[dr0i]

This release follows 6.1.2 #551.
Mandatory for #577.

Following guidelines.

- [ ] update dependencies if these are promising to not break much

• release test candidates
• test release candidates
• release on maven central
• release on github
• release metafacture-fix 1.2.0
• release metafacture-playground 1.2.0
• update flux-commands
• copy metafacture-fix' functions-and-cookbook to https://github.com/metafacture/metafacture-documentation/blob/master/docs/fix/Fix-functions-and-Cookbook.md
• write blog post
• toot
• write to email list
• announce at metadaten.community

[dr0i]

Based on the master the sonatype SNAPSHOT release 6.2.0-rc1-SNAPSHOT and github packages 6.2.0-rc1-SNAPSHOT are ready . See wiki/Maintainer-Guideline how to use it. Please test it and check mark:

• lobid-resources (@dr0i)
• playground (@dr0i, @TobiasNx )
• limetrans (@blackwinter)
• fix (@fsteeg) @dr0i (by just add the rc1-dep to fix and running the tests there)

[TobiasNx]

Based on the master the sonatype SNAPSHOT release 6.2.0-rc1-SNAPSHOT and github packages 6.2.0-rc1-SNAPSHOT are ready . See wiki/Maintainer-Guideline how to use it. Please test it and check mark:

* [x]  lobid-resources (@dr0i)

* [ ]  playground (@dr0i, @TobiasNx )

* [x]  limetrans (@blackwinter)

* [ ]  fix (@fsteeg)

Test playground seems not to be at the current master:

Testcase for #575

https://test.metafacture.org/playground/?flux=%22https%3A//d-nb.info/1106253078/about/marcxml%22%0A%7C+open-http%28accept%3D%22application/xml%22%29%0A%7C+decode-xml%0A%7C+handle-marcxml%28ignorenamespace%3D%22true%22%29%0A%7C+encode-json%28prettyPrinting%3D%22true%22%29%0A%7C+print%0A%3B

Not working.