See more on the version 4.5.0 release page.
When files (and Elements) are written to disk these now use a PascalCase format. This is partly because recent versions have also started to accept dashes and underscores in names, for example for Elements and tokens named things like my-design-system-button, which would be transformed into MyDesignSystemButton.
To ensure that files and imports have usable and working names, the decision was made to add a string transformer to the file output stage.
This may break stuff on your end if you were dependent on the previous, non-transformed format.
Previous versions in the 4.0 series have been using trash to handle files that need to be replaced. In 4.3.0 this is no longer the case.
Any deleted files are now permanently destroyed by the Node native fs module.
Versions 4.3.0 and 4.3.1 used a flaky dual-mode, configurable pattern where you could use either a "hard" or "soft" delete mode (soft deletes meaning placing files in a local trash folder). This is NOT supported and intended from 4.3.2 and forward as that was too buggy.