Bump default tox env from py37 to py38

Python 3.8 is now our highest level supported python runtime.
This updates the default tox target environments to swap out
py37 for py38 to make sure local development testing is
covering this version.

This does not impact zuul jobs in any way, nor prevent local
tests against py37. It just changes the default if none is
explicitly provided.

Change-Id: Ie160ee9faca27890e5fdcd21b1212d6c93cde735
Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index 94ff0be..bb3eea2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion = 3.2.0
-envlist = py37,pep8
+envlist = py38,pep8
 ignore_basepython_conflict = true
 
 [testenv]