update package and optimize dev env

[fohrloop]

Hi and thanks for the PR! Otherwise I understand this but could you explain why would

isinstance(dash_version, version.LegacyVersion)

need removal?

[Sisyphus235]

python removed Legacy Version https://packaging.pypa.io/en/latest/changelog.html

[mapix]

lgtm This modification makes it smoother in the new environment.

Related Issues:

• https://github.com/fohrloop/dash-uploader/issues/111