Add cache status output

[sergey-s-betke]

Description:
Please, add cache status output cache-hit (see https://github.com/actions/cache).

[TomBeckett]

I think this is coming, we're just waiting for merge: #275

[marko-zivic-93]

Hello @sergey-s-betke
Thank you very much for your request!
We are considering your feature request and will review the PR very soon and inform you about it.
Thank you for your patience.

[dmitry-shibanov]

Hello everyone. The cache-hit output was added. For now I'm going to close the feature request. If you have any concerns feel free to ping us.