Determine if executing in notebook < 7

[paddymul]

Checks

• I have checked that this issue has not already been reported.

• I have confirmed this bug exists on the latest version of Buckaroo.

What type of jupyter notebook were you using (VSCode notebook, google colab, Jupyter Lab, Jupyter notebook). Select multiple if you can reproduce this in multiple environments. If other, please add to description.

Jupyter Notebook

Reproducible example

import buckaroo
import pandas as pd
pd.DataFrame({'a':[1]})

Issue description

Buckaroo doesn't work in Notebook < 7. But as long as Jupyter Lab > 3.6 is present, buckaroo will install without downloading any new packages. The leads to errors like
Failed to load model Class 'DCEFWidgetModel' from Module 'buckaroo #103

Expected behavior

Buckaroo should figure out which environment it's running in, and if it is running in notebook < 7, throw an error with a good message explaining how to remedy it.

Installed versions

``` N/A ```

Jupyter Log output

No response