This is a breaking feature:
removing the possibility to set a custom name for a TOML file. I don't think this is needed anymore, since it is possible to set the workspace directory and build a project specific pyproject.toml with package includes that are "above" the actual project directory.
Decided to not use Semver for this yet, because the project still is in experimental mode.
Also: this version has less of manipulating with the Poetry internals (no factory overloads, use the original build command handle function).