Add tox environment

dstansby · dstansby · commit 70b77dec3d1a · 2023-08-25T17:16:35.000+01:00
diff --git a/tox.ini b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py{38,39,310}
+envlist = py{38,39,310,311}
 isolated_build = true
 
 [gh-actions]
