v0.9.0 broke my CI , needed to revert to 0.8.4

[João M.C. Teixeira]

Hi folks,
First of all, thanks so much for your amazing software.

Today, I got completely puzzled because my CI stop working with tox giving me this error:

/tmp/tmpo4js6lp2: 1: export: .: bad variable name , you can see it here in the github actions.

I needed to go dep by dep looking for which one of it had been updated in the last week because everything was working until some days ago. Finally, I found tox-conda had been updated during these days to 0.9.0.

This commit was working 6 days ago.

I am now merging this PR

to reproduce the error:

# clone the repo
conda create --name sometestenv python=3.9 pip setuptools wheel tox=3.24.4
tox -e py39

After that, you can change the line in tox.ini removing the version number
requires=tox-conda==0.8.4 to requires=tox-conda

Hope this helps,
Cheers,

[Antoine Dechaume]

Duplicate of #115.