.travis.yml in ebisu_connection-2.1.0 vs .travis.yml in ebisu_connection-2.2.0

@@ -9,30 +9,18 @@
   - cp test/config/database_postgresql.yml.travis test/config/database_postgresql.yml
   - psql -c 'create database ebisu_connection_test_master;' -U postgres
   - psql -c 'create database ebisu_connection_test_slave;' -U postgres
 cache: bundler
 rvm:
-  - 2.0.0
-  - 2.1.8
-  - 2.2.4
-  - 2.3.0
-  - ruby-head
+  - 2.1.10
+  - 2.2.6
+  - 2.3.3
+  - 2.4.0
 gemfile:
-  - gemfiles/rails40.gemfile
-  - gemfiles/rails41.gemfile
   - gemfiles/rails42.gemfile
   - gemfiles/rails50.gemfile
 matrix:
   exclude:
-    - rvm: 2.3.0
-      gemfile: gemfiles/rails40.gemfile
-    - rvm: ruby-head
-      gemfile: gemfiles/rails40.gemfile
-    - rvm: 2.0.0
+    - rvm: 2.1.10
       gemfile: gemfiles/rails50.gemfile
-    - rvm: 2.1.8
-      gemfile: gemfiles/rails50.gemfile
-  allow_failures:
-    - rvm: ruby-head
-    - gemfile: gemfiles/rails50.gemfile
   fast_finish: true
 bundler_args: --jobs 3 --retry 3