Bump minimum version

sfackler · sfackler · commit fb46202bd31c · 2016-12-23T11:01:35.000-05:00
Required for futures to build
diff --git a/.travis.yml b/.travis.yml
@@ -3,7 +3,7 @@ cache: cargo
 sudo: required
 rust:
 - nightly
-- 1.10.0
+- 1.13.0
 addons:
   postgresql: 9.4
 before_script:
