Remove direct dependency on Oj for use with jruby

lib/tracker_api.rb

@@ -11,14 +11,15 @@
 end
 require 'equalizer'
 require 'representable/json'
-require 'oj'
+require 'multi_json'
 
 # stdlib
 require 'addressable/uri'
 require 'forwardable'
 require 'logger'
 
-Oj.default_options = {:mode => :compat }
+MultiJson.load_options = {:mode => :compat}
+MultiJson.dump_options = {:mode => :compat}
 
 module TrackerApi
   autoload :Error, 'tracker_api/error'

lib/tracker_api/client.rb

@@ -190,7 +190,7 @@ def request(method, options = {})
       headers = options[:headers]
 
       if (method == :post || method == :put) && options[:body].blank?
-        body                    = Oj.dump(params)
+        body                    = MultiJson.dump(params)
         headers['Content-Type'] = 'application/json'
 
         params = {}

tracker_api.gemspec

@@ -23,14 +23,13 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'minitest'
   spec.add_development_dependency 'awesome_print'
   spec.add_development_dependency 'vcr'
-  spec.add_development_dependency 'multi_json'
 
   spec.add_dependency 'addressable'
   spec.add_dependency 'virtus'
   spec.add_dependency 'faraday', '~> 0.9.0'
   spec.add_dependency 'faraday_middleware'
   spec.add_dependency 'excon'
   spec.add_dependency 'equalizer'
-  spec.add_dependency 'oj'
   spec.add_dependency 'representable'
+  spec.add_dependency 'multi_json'
 end