Fix dev requirements install

[un4gt]

The command pip install -e '.[dev]' results in a syntax error on some systems due to single quotes.

In windows :

pip install -e '.[dev]'
ERROR: '.[dev]' is not a valid editable requirement. It should either be a path to a local project or a VCS URL (beginning with bzr+http, bzr+https, bzr+ssh, bzr+sftp, bzr+ftp, bzr+lp, bzr+file, git+http, git+https, git+ssh, git+git, git+file, hg+file, hg+http, hg+https, hg+ssh, hg+static-http, svn+ssh, svn+http, svn+https, svn+svn, svn+file).

By using double quotes (pip install -e ".[dev]"), the command runs successfully on all platforms, ensuring better cross-platform compatibility.

[lafrech]

The CI failure is unrelated and seems to be due to changes in bottle 0.13.

[sirosen]

The CI failure is unrelated and seems to be due to changes in bottle 0.13.

I'll plan to look into that either today or tomorrow.

[lafrech]

Thanks Stephen.

It seems related to how unicode errors are treated but I haven't gotten to the bottom of it and I gotta go.

I scrolled through bottle changelog and nothing stroke me as relevant to this issue.