Bump minimum version to 1.9.0

alexcrichton · alexcrichton · commit 501a5bfb4add · 2017-07-20T14:41:39.000-07:00
diff --git a/.travis.yml b/.travis.yml
@@ -6,7 +6,7 @@ rust:
 matrix:
   include:
     # Minimum version supported
-    - rust: 1.6.0
+    - rust: 1.9.0
       install:
       script: cargo build
 
