v1.4.2

Patch Changes

• #855 d7bdf39 Thanks @bmuenzenmeyer! - Adopt Changesets for releases: versioning and publishing are now driven by changeset files, which
  produce a CHANGELOG.md, git tags, and GitHub Releases.

• #895 9d7ce14 Thanks @avivkeller! - Avoids directly mutating the AST in legacy-json, as to ensure future generators do not run with a input different than they expect.