fix(travis): explicitly set rust version to nightly to fix deploy

xen0n · xen0n · commit 2325036b1227 · 2019-07-27T22:20:29.000+08:00
diff --git a/.travis.yml b/.travis.yml
@@ -10,6 +10,9 @@ env:
   global:
     - CRATE_NAME=autojump
 
+rust:
+  - nightly
+
 matrix:
   include:
     # OSX
