Use Ruby 2.5.3 in CI.

dblock · dblock · commit b57a2f5e0e9c · 2018-11-09T16:12:28.000-05:00
diff --git a/.travis.yml b/.travis.yml
@@ -7,7 +7,7 @@ cache: bundler
 services: mongodb
 
 rvm:
-  - 2.3.1
+  - 2.5.3
 
 before_install:
   - gem update bundler
