Fix a bunch of circular reference warnings

Honestly I'm not tremendously confident with this change. One problem is
that the files no longer require their "matcher" feature, so if they're
loaded directly (instead of as a side-effect of loading pact/matchers)
then you may see errors. 🤔

Author: iamvery

lib/pact/consumer_contract/query_string.rb

@@ -1,5 +1,4 @@
 require 'pact/shared/active_support_support'
-require 'pact/matchers'
 
 module Pact
   class QueryString

lib/pact/shared/form_differ.rb

@@ -1,4 +1,3 @@
-require 'pact/matchers/matchers'
 require 'uri'
 
 module Pact

lib/pact/shared/json_differ.rb

@@ -1,5 +1,3 @@
-require 'pact/matchers/matchers'
-
 module Pact
   class JsonDiffer
 

lib/pact/shared/request.rb

@@ -1,4 +1,3 @@
-require 'pact/matchers'
 require 'pact/symbolize_keys'
 require 'pact/consumer_contract/headers'
 require 'pact/consumer_contract/query'

lib/pact/shared/text_differ.rb

@@ -1,4 +1,3 @@
-require 'pact/matchers/matchers'
 require 'pact/matchers/difference'
 
 module Pact