add @mech to page

src/mechanize.cr

@@ -83,7 +83,7 @@ class Mechanize
 
   def parse(uri, response, body)
     code = response.not_nil!.status_code
-    MechanizeCr::Page.new(uri, response, body, code)
+    MechanizeCr::Page.new(uri, response, body, code, self)
   end
 
   def history

src/mechanize/http/agent.cr

@@ -78,7 +78,7 @@ module MechanizeCr
       end
 
       private def response_parse(response, body, uri)
-        @context.not_nil!.parse uri, response, body
+        @context.not_nil!.parse(uri, response, body)
       end
 
       private def add_response_cookies(response, uri, page)

src/mechanize/page.cr

@@ -5,7 +5,10 @@ class MechanizeCr::Page < MechanizeCr::File
   include MechanzeCr::ElementMatcher
   delegate :css, to: parser
 
-  def initialize(uri, response, body, code)
+  property mech : Mechanize?
+
+  def initialize(uri, response, body, code, mech=nil)
+    @mech = mech
     super(uri, response, body, code)
   end