.travis.yml in directory_diff-0.4.9 vs .travis.yml in directory_diff-0.4.10

@@ -1,24 +1,14 @@
 language: ruby
 dist: xenial
-matrix:
-  include:
-    - name: "Run Ruby 2.4.4 against pg 9"
-      rvm: 2.4.4
-      addons:
-        postgresql: 9.6
-    - name: "Run Ruby 2.4.4 against pg 10"
-      rvm: 2.4.4
-      addons:
-        postgresql: 10
-    - name: "Run Ruby 2.5.1 against pg 9"
-      rvm: 2.5.1
-      addons:
-        postgresql: 9.6
-    - name: "Run Ruby 2.5.1 against pg 10"
-      rvm: 2.5.1
-      addons:
-        postgresql: 10
+addons:
+  postgresql: 9.6
+rvm:
+  - 2.4.4
+  - 2.5.1
+gemfile:
+  - gemfiles/activerecord_5.1.gemfile
+  - gemfiles/activerecord_5.2.gemfile
 before_install: gem install bundler -v 1.11.2
 script:
   - bundle exec rake db:create
   - bundle exec rake spec