included_mutation

- rspec:0:./spec/http_spec.rb:8/Hobby::JSON #<Hobby::Test:0x00000003018e40> works
evil:Hobby::JSON.included:/home/ch1c0t/sources/ruby/hobby-json/lib/hobby/json.rb:6:581f7
@@ -1,5 +1,5 @@
-def self.included(app)
+def self.included
   app.use(Rack::ContentType, "application/json")
   app.response = Response
 end
-----------------------
Mutant configuration:
Matcher:         #<Mutant::Matcher::Config match_expressions: [Hobby::JSON]>
Integration:     Mutant::Integration::Rspec
Jobs:            2
Includes:        []
Requires:        []
Subjects:        2
Mutations:       46
Results:         46
Kills:           45
Alive:           1
Runtime:         16.06s
Killtime:        26.93s
Overhead:        -40.37%
Mutations/s:     2.86
Coverage:        97.83%