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: Iece749b90ec90bec1f5324bc351878e6252720ed
3 years ago · 18fc68dd26
1 changed files with 1 additions and 1 deletions
--- a/tox.ini
+++ b/tox.ini
@ -1,5 +1,5 @@
 [tox]
-minversion = 1.6
+minversion = 2.0
 envlist = py36,py35,py27,pep8
 skipsdist = True