* Technically an enhancement, these changes make the action behave as many customers already expect by ignoring any and all failures when the `fail-on-error` input is set to `false`. 
* Adds logic to handle any failures in "setup" tasks, including downloading the associated binary, verifying the binary, and finding the binary by its expected name after extraction.
* The new logic checks these actions and exits with exit code `1` on failure, except if `fail-on-error` input is set to `true`, in which case it returns exit code `0`.
* Adds a matrix workflow that tests the action for each `os` and each key binary command (`report` and `done`). Each of these scenarios implicitly tests our setup tasks since they run first in each scenario.
* Extends the behavior of `debug: true` to flip the shell-specific debug flag for each `os` including `set -x` for `linux` and `macos` and `Set-PSDebug -Trace 1` for `windows`

prepend the `v`

Update version of `checkout` action.

Correct some incorrect references to `lcov`, which seem to imply it as the only supported coverage report format, leftover from `v1` docs.

Replaces #198 and closes #197

* Add `build-number` to input options to let users override the action's default build number: `${{ github.run_id }}`.
 
Co-authored-by: Brian Torres <[email protected]>

* Add test for coverage-reporter-version.
* Add logic to handle when coverage-reporter-version is empty, in addition to when it is null/unset.
* Apply fail-on-error logic to error when user tries to set coverage-reporter-version on MacOS (not available there).

* Add a workflow to always point the major version tag to the latest release.