tree bc440feafe71dc9df03c5ff45b5bc657c47c0225
parent 4877f1d43259de39e9029aea90046351a0c3fb35
author Manik Bindlish <manikbindlish19@gmail.com> 1541134956 +0000
committer Manik Bindlish <manikbindlish19@gmail.com> 1541135049 +0000

Update min tox version to 2.0

The commands used by constraints need at least tox 2.0.
Update to reflect reality, which should help with local running of
constraints targets.

Change-Id: I343da220ef68a56448042046bf644b964ef71f62