This PR upgrades the version of `wasmtime` and `wasmtime-wasi` in use to
v21.0.1.
We have to skip v20 because Tree-sitter also skipped it.
Here are the changes that had to be made:
### v19 -> v20
After upgrading the `wasmtime` packages to v20, I also had to run `cargo
update -p mach2` to pull in
[v0.4.2](https://github.com/JohnTitor/mach2/releases/tag/0.4.2) to fix
some compile errors.
There were a few minor API changes in `wasmtime-wasi` from
https://github.com/bytecodealliance/wasmtime/pull/8228 that we needed to
account for.
### v20 -> v21
Since there isn't a Tree-sitter version that depends on `wasmtime@v20`,
we're jumping straight to v21.
The published version of Tree-sitter (v0.22.6) still depends on
`wasmtime@v19`, but there was a commit
(7f4a57817d)
later that month that upgrades the `wasmtime` dependency to v21.
We're patching Tree-sitter to that commit so we can get the new
`wasmtime` version.
The main change in v21 is that imports generated by `bindgen!` are no
longer automatically trapped
(https://github.com/bytecodealliance/wasmtime/pull/8310), so we need to
add `trappable_imports: true` to our `bindgen!` calls.
Release Notes:
- N/A
d755d29577