Release 1.12.0 "Convolution"

User-visible changes:
- Fixed a crash related to making keyboard visible.
- Better fallback: when selecting a missing layout named "fr+foo", "fr" will be used instead.
- When enabling the keyboard manually, it will never be stuck in the numbers view.
- Thai layout
- US-Colemak layout
- Czech layouts
- Esperanto layout
- Bulgarian layout
- Improved Norwegian layout

That's a lot of new layouts!

Plus a bunch of stricter warnings, MIPS64el support, and reproducible building.