.travis.yml in fluent-plugin-cat-sweep-0.1.4 vs .travis.yml in fluent-plugin-cat-sweep-0.1.5

@@ -2,10 +2,12 @@
 rvm:
   - 2.1.*
   - 2.2.*
   - '2.3'
   - '2.4'
+  - '2.5'
+  - '2.6'
 gemfile:
   - gemfiles/Gemfile.fluentd.0.14
   - gemfiles/Gemfile.fluentd.0.12
   - gemfiles/Gemfile.fluentd.0.10
   - gemfiles/Gemfile.fluentd.0.10.45
@@ -13,6 +15,14 @@
 matrix:
   exclude:
     - rvm: '2.4'
       gemfile: gemfiles/Gemfile.fluentd.0.10
     - rvm: '2.4'
+      gemfile: gemfiles/Gemfile.fluentd.0.10.45
+    - rvm: '2.5'
+      gemfile: gemfiles/Gemfile.fluentd.0.10
+    - rvm: '2.5'
+      gemfile: gemfiles/Gemfile.fluentd.0.10.45
+    - rvm: '2.6'
+      gemfile: gemfiles/Gemfile.fluentd.0.10
+    - rvm: '2.6'
       gemfile: gemfiles/Gemfile.fluentd.0.10.45