set ruby version

laiwei · laiwei · commit 943021519d37 · 2019-10-21T21:28:49.000+08:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,7 +1,7 @@
 sudo: false
 language: ruby
 rvm:
-    - 2.4.1p111
+    - 2.4.1
 branches:
   only:
   - source
