Take @skatejs/val inhouse

[markus-walther]

• modernize/simplify slightly (in version…0.5.0, was: 0.4.0)

Fixes #

Merge Checklist:

• [ ] Code selfreview has been performed (Best Practices).
• [ ] Tests are sufficient.
• [ ] Documentation is up to date.
• [ ] Changelog is up to date.
• [ ] Typescript typings for properties are up to date.
• [ ] Designers approved changes or no approval needed.
• [ ] Dependencies to other components still work.

[MKaHead]

in almost all package jsons we also have to take out skate js val as dependency and adjust create component script. We should merge text PR first.