Dropped support for older Poetry versions should be a major version update

[rene-gentzen-mittelstand-ai]

Hey mate, we install the plugin via poetry self add poetry-plugin-bundle in a lot of Dockerfiles. This does no longer work since we are sticking to Poetry 1.8.x for now.
poetry self add "poetry-plugin-bundle@^1.0.0" fixes the installation error but for some reason poetry will try to install version 1.6.0 and just fail due to the poetry version constraints if the version specifier is ommitted.
In my opinion something as huge as dropping support for the longterm default version of poetry a mere six weeks after its release should lead to poetry-plugin-bundle 2.0.0.

That being said, thanks for the awesome plugin!