Travis: Enable Ruby 1.9.3

.travis.yml

@@ -1,8 +1,7 @@
 language: ruby
 rvm:
   - 1.8.7
-# TODO: fix ruby 1.9x build issues... 
-#  - 1.9.3
+  - 1.9.3
 # TODO: make this work with the regular rake command
 script: "bundle exec rake spec"
 gemfile:
@@ -12,4 +11,4 @@ before_script:
   - psql -c 'create database database_cleaner_test;' -U postgres
   - cp db/sample.config.yml db/config.yml
 services:
-  - mongodb
+  - mongodb