Add tests for Rails 5.2.0 x Ruby 2.4.4

Author: n-rodriguez

.travis.yml

@@ -23,6 +23,9 @@ matrix:
     - rvm: 2.4.4
       gemfile: gemfiles/rails_5.1.6.gemfile
       env: DB_ADAPTER=postgresql
+    - rvm: 2.4.4
+      gemfile: gemfiles/rails_5.2.0.gemfile
+      env: DB_ADAPTER=postgresql
     - rvm: 2.4.4
       gemfile: gemfiles/rails_4.2.10.gemfile
       env: DB_ADAPTER=mysql2
@@ -32,6 +35,9 @@ matrix:
     - rvm: 2.4.4
       gemfile: gemfiles/rails_5.1.6.gemfile
       env: DB_ADAPTER=mysql2
+    - rvm: 2.4.4
+      gemfile: gemfiles/rails_5.2.0.gemfile
+      env: DB_ADAPTER=mysql2
     - rvm: 2.4.4
       gemfile: gemfiles/rails_4.2.10.gemfile
       env: DB_ADAPTER=oracle_enhanced
@@ -41,6 +47,9 @@ matrix:
     - rvm: 2.4.4
       gemfile: gemfiles/rails_5.1.6.gemfile
       env: DB_ADAPTER=oracle_enhanced
+    - rvm: 2.4.4
+      gemfile: gemfiles/rails_5.2.0.gemfile
+      env: DB_ADAPTER=oracle_enhanced
 after_success:
   - bundle exec codeclimate-test-reporter
 services: