Bump two formulae at once

[chenrui333]

Right now, there are some formulae are sharing the same source code tree and require version bump at the same time. I wonder if there is any way to bump two or more formulae at the same time. Thanks!

For example like this PR

[bryantbiggs]

Similar situation, but its one formula and two platforms. For example, we support both mac and linux, how could we update a formulate like ripgrep https://github.com/BurntSushi/ripgrep/blob/master/pkg/brew/ripgrep-bin.rb with this action

[mislav]

@chenrui333 I wasn't aware of this being a requirement of Homebrew-core CI for some formulae. Right now this isn't possible. If this was possible, how would you imagine configuring the action for this mode of operation?

@bryantbiggs This was requested before, but it was closed by the requester #5. Feel free to open a new issue for that and reference the old one.

[p-linnane]

@mislav Some formulae are listed in synced_versions_formulae, which requires them to be updated in the same PR. This is usually because they won't build without each other.