feat(CI/Travis): upgrade Ubuntu to 20.04 (#862)

FrancescoBorzi · web-flow · commit c4983405a9b9 · 2020-08-29T14:37:16.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,7 +1,7 @@
 language: node_js
 node_js:
   - '12'
-dist: bionic
+dist: focal
 sudo: required
 services:
   - xvfb
