Version 0.2.0
See release notes:
https://vyper.readthedocs.io/en/stable/release-notes.html#v0-2-1
NOTE: v0.2.0 had a conflict in PyPI, but is identical to v0.2.1
See release notes:
https://vyper.readthedocs.io/en/stable/release-notes.html#v0-2-1
NOTE: v0.2.0 had a conflict in PyPI, but is identical to v0.2.1