Add langauge to bionic to pick right image

zhengphou · zhengphou · commit 42dd163fc654 · 2019-06-12T12:47:25.000+08:00
diff --git a/.travis.yml b/.travis.yml
@@ -3,6 +3,7 @@ language: php
 matrix:
   include:
     - dist: bionic
+      language: minimal
       group: dev
       env:
         - RELEASE=bionic
