Update .travis.yml to release only on master

wrouesnel · wrouesnel · commit e292e82221a7 · 2016-06-03T23:13:55.000+10:00
diff --git a/.travis.yml b/.travis.yml
@@ -22,4 +22,5 @@ deploy:
   file: postgres_exporter
   on:
     tags: true
+    branch: master
     repo: wrouesnel/postgres_exporter
