chore(travis): use latest version of pg

gregberge · gregberge · commit 8a62f5463d55 · 2020-03-29T12:33:56.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -3,8 +3,6 @@ notifications:
   email: false
 services:
   - postgresql
-addons:
-  postgresql: '9.6'
 node_js:
   - 10
   - 12
