The existing version tests only check output format via regex, which is
why the PATH-shadowing bug (#230) slipped through — the bootstrap pnpm's
version string matched the regex just as well as the requested version.
- test_version_respects_request: runs the action with `version: 9.15.5`
and `version: 10.33.0` (both differ from the bootstrap) and asserts
that `pnpm --version` matches exactly. Regression test for #225/#230.
- test_package_manager_field: writes a `packageManager: pnpm@<v>` entry
into package.json, runs the action with no `version:` input, and
asserts exact match. Reproduces #227; currently expected to fail
since `packageManager` extraction was intentionally not added.
Zoltan Kochan
bdf0af2a9d