Allow to pass glob or regex to linked config

Affected Packages

Problem

When using the linked config option, it can get quite verbose to write and keep track of all the packages in the repo.

This becomes obvious when you want to “simulated” the “locked” mode of Lerna, where all packages follow more or less a common version (as suggested here https://github.com/atlassian/changesets/issues/356#issuecomment-625203441).

Proposed solution

One thing that would help is to allow to pass a regex or a glob string instead of listing all packages explicitly.

For example:

{
  "linked": [
    ["@changesets/*"]
  ]
}

Or even introduce a new option that automatically link all packages. For example:

{
  "linkAllPackages": true
}

It would be enough to have a glob/regex, which is a bit more flexible.

What do you think?

[emmenko]

PR is open, let me know what you think

[emmenko]

FYI: I started working on this.