.travis.yml: enabling os matrix on multiple 3 latests Ubuntu LTS

Damien Nadé · Damien Nadé · commit 353d587e246b · 2017-07-20T14:29:22.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,3 +1,12 @@
+matrix:
+  include:
+    - os: linux
+      dist: precise
+    - os: linux
+      dist: trusty
+    - os: linux
+      dist: xenial
+
 language: bash
 
 script:
