v0.10.0-api4: Final release for SpongeAPI 4.x

After a lot of thought, and with the official release of SpongeAPI 5.0.0, I have decided to drop feature support for API 4.

This release contains all the feature updates that I have made up to this point. From this point on, features will be developed for API 5.
Similar to how things were, API 5 will be the API by which I write featues, with a forward port to API 6 (also known as bleeding).

Features will NOT be backported to API 4, but I may still include bugfixes if the need arises.

Thank you all for understanding, Now onto changes:

- Wands have gotten a revamp. They can now save data to itemstacks, and be applied to any item.
- Command parser has recieved various improvements.
- Wands support colored selections, as does the CUI. Why this was done I have no idea. I was bored.
- Other bugfixes here and there.

Most of the updates were backend updates for future features, so I apologize that they couldn't make it into this release.

Anyway thanks for sticking with me all this time, and I hope you guys can enjoy the future updates!