Merge pull request itmammoth#39 from itmammoth/unsupport_old_ruby_ver…

…sions

Stop supporting old ruby versions in Travis CI

.travis.yml

@@ -1,14 +1,11 @@
 language: ruby
 before_install:
-  - gem update --system
-  - gem update bundler
-  - gem cleanup bundler
+  - gem uninstall -v '>= 2' -i $(rvm gemdir)@global -ax bundler || true
+  - gem install bundler -v '< 2'
 install: "bundle install --jobs 8"
 rvm:
-  - 1.9.3
-  - 2.2.10
-  - 2.4.5
-  - 2.5.3
+  - 2.4.6
+  - 2.5.5
   - ruby-head
 gemfile:
   - gemfiles/rails42.gemfile
@@ -17,14 +14,8 @@ gemfile:
   - gemfiles/rails52.gemfile
 matrix:
   exclude:
-    - rvm: 1.9.3
-      gemfile: gemfiles/rails50.gemfile
-    - rvm: 1.9.3
-      gemfile: gemfiles/rails51.gemfile
-    - rvm: 1.9.3
-      gemfile: gemfiles/rails52.gemfile
-  allow_failures:
     - rvm: ruby-head
+      gemfile: gemfiles/rails42.gemfile
   fast_finish: true
 script:
   - RAILS_ENV=test bundle exec rake db:migrate --trace