Use Changesets instead of Lerna

[andrii-bodnar]

Since v5, we have had a blocking problem with Lerna (#2124), which prevents us from doing automatic releases.

Consider switching to Changesets. A list of current use cases can be found in this comment.

[timofei-iatsenko]

Few things on top of my head:

• Need to install changesets app https://github.com/apps/changeset-bot
• Action for creating pr / publish packages and create release on github https://github.com/changesets/action
• Changeset should be configured for fixed packages, with { "fixed": [["*"]] }

[andrii-bodnar]

Faced a blocking problem when implementing this. Changeset always tries to bump the major version for all packages, even if there is only a patch or minor change for some of the peer dependencies.

There is an interesting note in their docs:

Currently, if you list a package as a peerDependency of another package, this causes the package with the peerDependency to be released as a major change. This is because peerDependency changes will not be caught by a package installation.

In addition, there are a few issues I found related to the same problem with peerDependencies: changesets/changesets#1011, changesets/changesets#822, changesets/changesets#1279, changesets/changesets#1126.

There is also a non-blocking but annoying problem with the jest-mocks package. There is no way to ignore it, and it's listed in the changeset version command. Also, Changeset will attempt to maintain a changelog for this package. Issue changesets/changesets#1158.

Here is my WIP commit: link.