fix: EINVAL when spawning on Windows
Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Shelley Vohr <shelley.vohr@gmail.com>
* build: unify YARN_VERSION variable usage and ensure CI uses yarn not npm
* chore: use a JS helper so that it can work on windows
* chore: make script/yarn without node_modules installed