Plan to deprecate this Action

[svartalf]

Main reason for this Action to exist is to ship tarpaulin binary into the CI environment asap by downloading it from the GitHub releases page.

With actions-rs/install#4 resolved, this Action will be deprecated and archived.

[CAD97]

I still think this action is useful. The primary reason is that this action downloads the official binary from tarpaulin's releases page, whereas install downloads your own built cache of the library.

[svartalf]

I do agree that "your own built cache" is a terrible long-term solution and should be removed as soon as possible; but note that actions-rs/install#4 says that GitHub cache store (as in actions/cache) is planned to be used instead of it.