try travis

Change-Id: I35efacefa60ff3767a7487f457810a4c25819cec
diff --git a/.travis.yml b/.travis.yml
index 429d56c..88e7473 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,7 @@
 version: ~> 1.0
 language: cpp
 os: linux
-dist: bionic
+dist: focal
 
 arch:
   - amd64