travis: Upgrade dist to focal

aciba90 · aciba90 · commit 87b2f1d0a48e · 2022-07-06T16:03:17.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,5 @@
 language: python
-dist: bionic
+dist: focal
 
 # We use two different caching strategies.  The default is to cache pip
 # packages (as most of our jobs use pip packages), which is configured here.
