Use Ruby 2.6.3

aycabta · aycabta · commit b7beabe15cb6 · 2019-05-05T05:49:41.000+09:00
diff --git a/.travis.yml b/.travis.yml
@@ -7,7 +7,7 @@ rvm:
   - 2.3.8
   - 2.4.6
   - 2.5.5
-  - 2.6.2
+  - 2.6.3
   - ruby-head
   - jruby-9.1.17.0
   - jruby-9.2.6.0
