Update Travis build matrix

Author: sikachu

.travis.yml

@@ -6,10 +6,11 @@ rvm:
   - 1.9.3
   - 2.0.0
   - 2.1.10
-  - 2.2.9
-  - 2.3.6
-  - 2.4.3
-  - 2.5.0
+  - 2.2.10
+  - 2.3.8
+  - 2.4.5
+  - 2.5.3
+  - 2.6.1
   - ruby-head
 gemfile:
   - gemfiles/rails_4.0.gemfile
@@ -22,15 +23,19 @@ gemfile:
 matrix:
   fast_finish: true
   exclude:
-    - rvm: 2.4.3
+    - rvm: 2.4.5
       gemfile: gemfiles/rails_4.0.gemfile
-    - rvm: 2.5.0
+    - rvm: 2.5.3
+      gemfile: gemfiles/rails_4.0.gemfile
+    - rvm: 2.6.1
       gemfile: gemfiles/rails_4.0.gemfile
     - rvm: ruby-head
       gemfile: gemfiles/rails_4.0.gemfile
-    - rvm: 2.4.3
+    - rvm: 2.4.5
+      gemfile: gemfiles/rails_4.1.gemfile
+    - rvm: 2.5.3
       gemfile: gemfiles/rails_4.1.gemfile
-    - rvm: 2.5.0
+    - rvm: 2.6.1
       gemfile: gemfiles/rails_4.1.gemfile
     - rvm: ruby-head
       gemfile: gemfiles/rails_4.1.gemfile
@@ -58,9 +63,11 @@ matrix:
       gemfile: gemfiles/rails_edge.gemfile
     - rvm: 2.1.10
       gemfile: gemfiles/rails_edge.gemfile
-    - rvm: 2.2.9
+    - rvm: 2.2.10
+      gemfile: gemfiles/rails_edge.gemfile
+    - rvm: 2.3.8
       gemfile: gemfiles/rails_edge.gemfile
-    - rvm: 2.3.6
+    - rvm: 2.4.5
       gemfile: gemfiles/rails_edge.gemfile
   allow_failures:
     - rvm: ruby-head