Update wasmer to 3.1.1

[Razican]

It turns out that icu_codepointtrie_builder depends on wasmer 2.2.1, which in its dependency tree contains the mach dependency. This dependency is no longer maintained, as it can be seen in the below advisory.

The good news is that wasmer 3.1.1 no longer depends on mach, so an update of the dependency should solve the issue.

---

mach is unmaintained

Details
Status	unmaintained
Package	mach
Version	0.3.2
URL	fitzgen/mach#63
Date	2020-07-14

Last release was almost 4 years ago.

Maintainer(s) seem to be completely unreachable.

Possible Alternative(s)

These may or may not be suitable alternatives and have not been vetted in any way;

• mach2 - direct fork

See advisory page for additional details.

[sffc]

@Razican Would you like to make a PR for this?

[Razican]

@Razican Would you like to make a PR for this?

I was trying to do the PR yesterday, but since I'm not familiar with ICU and washer, I didn't know how to migrate the compile errors

The new version doesn't have some features used by ICU4x, but it seems it now can use other crates to implement the required compilers and engines.

[robertbastian]

Wasmer 3.1.1 doesn't even build for me. It's also broken on docs.rs, and in fact still seems to pull in mach.

[robertbastian]

All we can do here is update wasmer, although that doesn't seem to remove the dependency (#3367 (comment))