v43.1.2 - Downgrade `package-tools` (maintenance)

What's Changed

Downgrade ckeditor-package-tools for now

Note

This does not yet support the new installation method for [custom plug

• js(deps) Downgrade ckeditor5-package-tools 2 -> 1 for now by @tony in #150

Full Changelog: v43.1.1...v43.1.2