Travis: switch to Bionic

diff --git a/.travis.yml b/.travis.yml
index 4ba4e2a..6e1199d 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,10 +18,10 @@ matrix:
         - CXX=clang++
         - PATH="/usr/local/opt/mysql-client/bin:$PATH"
     - os: linux
-      dist: xenial
+      dist: bionic
       compiler: clang
     - os: linux
-      dist: xenial
+      dist: bionic
       compiler: gcc
 
 before_install: