.travis.yml in carrierwave-aliyun-0.4.3 vs .travis.yml in carrierwave-aliyun-0.4.4

@@ -1,8 +1,8 @@
 language: ruby
 bundler_args: --without development
 
 rvm:
   - 2.3.0
-  - 2.1.0
+  - 2.1.8
 
 script: rspec spec