.travis.yml in rakuten_web_service-1.10.0 vs .travis.yml in rakuten_web_service-1.11.0

@@ -1,8 +1,7 @@
 language: ruby
 rvm:
-  - 2.3.6
   - 2.4.3
   - 2.5.0
   - 2.6.0
   - ruby-head
 
@@ -30,12 +29,12 @@
 
 matrix:
   allow_failures:
   - rvm: ruby-head
   exclude:
-  - rvm: 2.3.6
-    env: INTEGRATION=yes
   - rvm: 2.4.3
+    env: INTEGRATION=yes
+  - rvm: 2.5.0
     env: INTEGRATION=yes
   - rvm: ruby-head
     env: INTEGRATION=yes
 
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