Log Message:
Update ruby-classifier-reborn to 2.0.4.

v2.0.4

Major Enhancements

* Classification thresholds can be enabled or disabled. The default is
  disabled. The threshold value can be set at initialization time or
  dynamically during processing (#47)
* Made auto-categorization optional, defaulting to false (#45)
* Added the ability to handle an array of classifications to the constructor
  (#44)
* Classification with a threshold has been added to the api (#39)

Minor Enhancements

* Documentation around threshold usage (#54)
* Fixed UTF-8 encoding for hasher.rb (#50)
* Removed some unnecessary methods (#43)
* Add optional CachedContentNode (GSL only) (#43)
* Caches the transposed search_vector (#43)
* Added custom marshal_ methods to not save the cache when dumping/loading
  (#43)
* Optimized some numeric comparisons and iterators (#43)
* Added cached calculation table when computing raw_vectors (#43)
* If a category name is already a symbol, just return it (#45)
* Various Hash improvements (#45)
* Eliminated several Ruby :warning:s when run with RUBYOPT="-w" (#38)
* Simple performance improvements for the Hasher process (#41)
* Fixes for broken regex splitting for non-ascii characters and removal of the
  unused punctuation filter (#41)
* Add multiple language stopwords with customizable stop word paths (#40)

Bug Fixes

* Fixed the bug where adding the same category a second time would clobber the
  category that was already there (#45)
* Fixed deprecation warning for <=> in ls.rb (#33)
* Remove references to Madeline in the README and replace it with Marshal or
  Redis (#32)

Development Fixes

* Added development dependency on mini_test and added 2.2 to travis.yml (#36)