Update CHANGELOG to describe new Package.resolved format (#3991)
Update CHANGELOG to describe new Package.resolved format (#3991)

* Update CHANGELOG to describe new Package.resolved format

motivation: document user visible changes in change log

changes: Update CHANGELOG to describe Package.resolved 2.0 format

Co-authored-by: Anders Bertelrud <dfdb7392591db597bc41cf266a9c3bc12a2706e5@apple.com>
abertelrud/swift-package-manager,apple/swift-package-manager,apple/swift-package-manager,abertelrud/swift-package-manager,apple/swift-package-manager,abertelrud/swift-package-manager,apple/swift-package-manager,apple/swift-package-manager,abertelrud/swift-package-manager,abertelrud/swift-package-manager