Update Fennel to version 1.0.0.

[technomancy]

This updates Fennel to the latest stable release, 1.0.0: https://fennel-lang.org/v1.0.0/#section

Note that our intent is that this is the last Fennel release ever to contain intentionally breaking changes, other than for potential security issues. We also expect to slow down on development of the language and focus more on ecosystem stuff after this, so I should be pestering you with fewer PRs like this in the future. =)

I have tested this with all known Fennel TIC-80 games. I found two problems.

One of them is that Amethyst Waters has a graphical glitch:

The other is that the player sprites in Butterfly Effect are not rendered: https://alloy-d.itch.io/butterfly-effect In particular the calls to spr from the draw-player function appear to have no effect.

However, both these bugs also manifest on the current git build from before this patch is applied, so they do not seem to be related to the upgrade to Fennel 1.0.0.

[nesbox]

Great, thank you.
I'll check these games later.

[technomancy]

Thanks for merging this.

I went back to check and it seems that the Amethyst Waters bug is a duplicate of #1687; going back to the previous commit as the one mentioned there makes the problem disappear, so that one at least is covered.

The other issue was caused by #1508 so I can open a separate issue about that. Edit: just saw that you already opened an issue for them so I will post this info there.