kit-1.0.0-alpha.3 & code-0.5.0-alpha.4

This release is published under the next tag and won't be installed automatically. To use it, specify the version when installing or updating.

• @ui-schema/kit-codemirror > 1.0.0-alpha.3
• @ui-schema/material-code > 0.5.0-alpha.4

Consistent readme.