CI: Upgrade Linux distribution

effigies · effigies · commit 9dc7f43f5600 · 2020-10-21T16:53:59.000-04:00
Focal is latest, but Neurodebian only supports through Bionic
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,5 @@
 os: linux
-dist: xenial
+dist: bionic
 
 language: python
 # our build matrix
