Merge pull request #85 from nicolasleger/patch-1

[CI] Test against Ruby 2.4 and 2.5

Author: dblock

.travis.yml

@@ -4,29 +4,30 @@ sudo: false
 
 matrix:
   include:
-    - rvm: 2.3.1
+    - rvm: 2.5.0
       script:
         - bundle exec danger
-    - rvm: 2.3.1
+    - rvm: 2.5.0
       env: GRAPE_VERSION=0.8.0
-    - rvm: 2.3.1
+    - rvm: 2.5.0
       env: GRAPE_VERSION=0.9.0
-    - rvm: 2.3.1
+    - rvm: 2.5.0
       env: GRAPE_VERSION=0.10.1
-    - rvm: 2.3.1
+    - rvm: 2.5.0
       env: GRAPE_VERSION=0.12.0
-    - rvm: 2.3.1
+    - rvm: 2.5.0
       env: GRAPE_VERSION=0.13.0
-    - rvm: 2.3.1
+    - rvm: 2.5.0
       env: GRAPE_VERSION=0.14.0
-    - rvm: 2.3.1
+    - rvm: 2.5.0
       env: GRAPE_VERSION=0.15.0
-    - rvm: 2.3.1
+    - rvm: 2.5.0
       env: GRAPE_VERSION=0.16.2
-    - rvm: 2.3.1
+    - rvm: 2.5.0
       env: GRAPE_VERSION=HEAD
-    - rvm: 2.3.0
-    - rvm: 2.2.5
+    - rvm: 2.4.3
+    - rvm: 2.3.6
+    - rvm: 2.2.9
     - rvm: rbx-2
     - rvm: jruby-19mode
     - rvm: ruby-head