ci: allow auto and try branches

.travis.yml

@@ -1,6 +1,3 @@
-# Based on the "trust" template v0.1.1
-# https://github.com/japaric/trust/tree/v0.1.1
-
 dist: trusty
 language: rust
 services: docker
@@ -32,14 +29,13 @@ after_script: set +e
 
 cache: cargo
 before_cache:
-  # Travis can't cache files that are not readable by "others"
   - chmod -R a+r $HOME/.cargo
 
 branches:
   only:
-    # release tags
-    - /^v\d+\.\d+\.\d+.*$/
+    - auto
     - master
+    - try
 
 notifications:
   email: