[MIG] .travis.yml: Upgrade to Postgres 9.6

OCA-git-bot · OCA-git-bot · commit 2d07bff9c167 · 2018-10-01T09:29:02.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -2,6 +2,7 @@ sudo: false
 cache: pip
 
 addons:
+  postgresql: "9.6"
   apt:
     packages:
       - expect-dev  # provides unbuffer utility
