Limit the branches that travis builds on

carols10cents · carols10cents · commit fcee1b255988 · 2019-12-18T15:46:08.000-05:00
Because branches that become PRs are built twice :(
diff --git a/.travis.yml b/.travis.yml
@@ -2,6 +2,12 @@ language: rust
 sudo: required
 dist: xenial
 
+branches:
+  only:
+  - auto
+  - try
+  - master
+
 cache:
   cargo: true
   directories:
