Use a minimal environment for Travis CI

ferrarimarco · ferrarimarco · commit b3aa77dae87c · 2019-06-08T17:28:29.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,6 @@
 ---
 sudo: required
+language: minimal
 
 services:
   - docker
