Switch to Xenial for CI runs.

fancycode · fancycode · commit 9f3795240763 · 2019-02-24T15:07:24.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -80,6 +80,8 @@ matrix:
 
 language: cpp
 
+dist: xenial
+
 cache:
   - apt
   - ccache
