* Fixed:
* Previously, when building a source distribution with `poetry build`, the
plugin's config section would retain the `enable = true` setting, which
would then cause an error when installing the artifact since the VCS info
would not be available.
(This was not an issue for wheels generated by `poetry build`.)
The dynamic version from build time is still present in the source
distribution, so there is no need for the plugin at install time.
Therefore, the plugin now temporarily sets `enable = false` so that that
value will be placed in the source distribution, then restores the original
setting for development purposes.