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: I0675da8241f60e8699f2aa80b13773d9284cc3ae
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 1dba036..7f7ed55 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion = 3.1.0
-envlist = py37,pep8
+envlist = py38,pep8
 ignore_basepython_conflict = True
 
 [testenv]