CI: pin windows-latest to windows-2019

[rcny]

This PR can be used as the possible temporary fix until the project's dependencies will be able to compile on windows-2022.

[codecov-commenter]

Codecov Report

Merging #352 (f2ed48f) into master (3ff9241) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #352   +/-   ##
=======================================
  Coverage   80.76%   80.76%           
=======================================
  Files          79       79           
  Lines        9513     9513           
=======================================
  Hits         7683     7683           
  Misses       1830     1830           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3ff9241...f2ed48f. Read the comment docs.

[Robbepop]

Thank you for the PR. So unfortunately the wabt dependency causes the trouble.
The good thing is that we are already planning on phasing it out in wasmi_v1. The bad thing is that this process will probably take a while to complete.
Until then I guess we unfortunately need to deal with this heavily outdated windows experience.

[rcny]

Not sure that windows-2019 is already outdated. It has mainstream support until the beginning of 2024 and e.g. Rust team is only planning migration to windows-2022.

[Robbepop]

Thanks a lot for fixing the CI.
We really should get wabt as dependency out of this library. While windows-2019 will be supported for quite some time we want to always be working on the latest versions.