Replace Yajl with Oj

after some benchmarking

lib/spontaneous/data_mapper/content_model/serialization.rb

@@ -38,7 +38,7 @@ def _deserialize_column(column)
       end
 
       def _deserialize_value(value)
-        Yajl::Parser.new(:symbolize_keys => true).parse(value || "null")
+        Spontaneous::parse_json(value || "null")
       end
 
       def _serialize_column(column, value)
@@ -47,7 +47,7 @@ def _serialize_column(column, value)
       end
 
       def _serialize_value(value)
-        Yajl::Encoder.new.encode(value)
+        Spontaneous::encode_json(value)
       end
     end
   end

lib/spontaneous/json.rb

@@ -1,6 +1,7 @@
 # encoding: UTF-8
 
-require 'yajl'
+# require 'yajl'
+require 'oj'
 
 Oj.default_options = { mode: :compat } if defined?(Oj)
 
@@ -23,7 +24,7 @@ def encode(object)
     if defined?(::Yajl)
       module YajlParser
         def parser
-          Yajl::Parser.new(:symbolize_keys => true)
+          Yajl::Parser.new(symbolize_keys: true)
         end
         def encoder
           Yajl::Encoder.new

spontaneous.gemspec

@@ -48,7 +48,7 @@ Gem::Specification.new do |s|
   s.add_dependency('thor',            ['~> 0.16'])
   s.add_dependency('uglifier',        ['~> 1.3'])
   s.add_dependency('xapian-fu',       ['~> 1.5'])
-  s.add_dependency('yajl-ruby',       ['~> 1.1'])
+  s.add_dependency('oj',              ['~> 2.11'])
 
   s.add_development_dependency('minitest',  ['~> 4.7.0'])
   s.add_development_dependency('minitest-colorize', ['~> 0.0.5'])