Update Snapshot Action: fix handling of the browser option

[jtpio]

The browser input did not seem to be used.

• Allow installing a specific browser or all of them by default
• Pass the browser to the update_script

[jtpio]

Need to double check how --browser is handled when left empty.

[krassowski]

I think this is an improvement as-is. This fixes #183. Should we merge?

[jtpio]

I think it's still a draft because it wasn't clear how Playwright would handle the empty ('') default parameter with --browser ${{ inputs.browser }}.

Not sure I'll have the bandwith to get back to it in the coming days, so if you would like to pick up this PR then feel free, thanks!

[krassowski]

Allow installing a specific browser or all of them by default

I am not sure if we ever need to test all browsers in a single run of the action. If we want to test on multiple browsers we would likely split these into multiple runs anyways so that it is easier to rerun flaky jobs.

[jtpio]

Thanks @krassowski for the review.

If we want to test on multiple browsers we would likely split these into multiple runs anyways so that it is easier to rerun flaky jobs.

Yes makes sense to use a test matrix.

[fcollonval]

@jtpio @krassowski I guess this is ok to be merged, isn't it?

[jtpio]

Yes it should be to good to go.