JupyterLab dependency incorrectly specified

[ZelphirKaltstahl]

I think there is a mistake with specifying JupyterLab as a dependency incorrectly.

When I install jupyterlab-code-formatter = "==2.2.1" with juypterlab = "==3.1.13" using pipenv, I receive no warning at all, that these versions are not compatible. In fact, I see JupyterLab being wrongly specified here https://github.com/ryantam626/jupyterlab_code_formatter/blob/4b68e0c4ee45b1a4c985bbd8d6ebc1a138e2cc82/pyproject.toml#L40, while JupyterLab itself tells me, that jupyterlab-code-formatter at version 2.2.1 is incompatible, when I run jupyter labextension list:

"jupyterlab_code_formatter@2.2.1" is not compatible with the current JupyterLab
Conflicting Dependencies:
JupyterLab                  Extension       Package
>=3.1.12 <3.2.0             >=3.6.0 <4.0.0||>=4.0.0 <4.1.0@jupyterlab/application
>=3.1.12 <3.2.0             >=3.6.0 <4.0.0||>=4.0.0 <4.1.0@jupyterlab/fileeditor
>=3.1.12 <3.2.0             >=3.6.0 <4.0.0||>=4.0.0 <4.1.0@jupyterlab/mainmenu
>=3.1.12 <3.2.0             >=3.6.0 <4.0.0||>=4.0.0 <4.1.0@jupyterlab/settingregistry

This package should specify its dependency properly, so that users notice this mismatch in dependencies as early as possible, which is when installing the Python package from PyPI.

Now I also cannot easily figure out, which version of jupyterlab-code-formatter I have to use instead, because I first have to create a complete setup, install the extension etc. and then run jupyter labextension list again, to find out, whether I installed a compatible version.

[krassowski]

Closing as fixed by #346 (released in v3.0.0).