Add condaEnv variable that allow to use a conda environment for commands

[AthAshino]

Hey,

As I said in the discussions, I needed to run my linter through a conda environment. So I decided to make it possible by adding a new variable "condaEnv"

[LMaxence]

Hello !

Thanks for your contribution :) Everything is fine on my side, I'll only let you get the commit signed before I merge and release a new fix version

[AthAshino]

There we go! Signed and squashed

[LMaxence]

You're good to go ! Should be published with the 2.3.0version :) Many thanks for making this compatible with Conda, feel free to re-open an issue in case of problems !