Prepare for 1.0

[Nyholm]

This will fix #11

This package has been fairly stable for a long while.

[Zegnat]

Seems fine to me. It has been stable to a while now. Wondering if we want to clear the other 2 PRs before pushing 1.0?

[Zegnat]

I have just rebased #27 on the latest master. It introduces a minor parameter widening on the methods ($post goes from array to array|null). Would love to be able to land that before version 1.0. As I think it is the only thing (from both PRs and issues) that actually signifies a method signature change.

[Nyholm]

PR is rebased and the BC break is documented

[Zegnat]

I do not think I have time to look at #34 today, which is the final PR left on the list. That one should not cause any further API changes however, so I think we can tag 1.0 whenever suits now that #27 is in! 🚀

[Nyholm]

I made another small change to this PR. What do you think?

[Zegnat]

Aah, I must have missed that one. If I read this correctly, this is to allow the user to pass in null when they want to specify $files and $body? Makes a lot of sense to me!

[Nyholm]

Thank you