Include test files in gem package

- Add 'test/*' to the list of files included in the gem specification

Author: cardmagic

classifier.gemspec

@@ -6,7 +6,7 @@ Gem::Specification.new do |s|
   s.author = 'Lucas Carlson'
   s.email = '[email protected]'
   s.homepage = 'https://github.com/cardmagic/classifier'
-  s.files = Dir['{lib}/**/*.rb', 'bin/*', 'LICENSE', '*.md']
+  s.files = Dir['{lib}/**/*.rb', 'bin/*', 'LICENSE', '*.md', 'test/*']
   s.license = 'LGPL'
 
   s.add_dependency 'fast-stemmer', '~> 1.0.0'