Introduce dev version suffix

During %0.8.0 development it wasn’t clear which version we were using between the one installed from pip and the local one in your Poetry devenv. I propose to use 0.9.0dev when branching.

It might be necessary to handle this temporary version format: in release.sh and elsewhere. Actually, it just requires to comment commit_tag line in release.sh.

Edited Oct 20, 2020 by Moul

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information