fix: correctly read local windows pact file paths with backslashes

lib/pact/consumer_contract/pact_file.rb

@@ -36,7 +36,7 @@ def save_pactfile_to_tmp pact, name
     end
 
     def render_pact(uri_string, options)
-      uri_obj = URI(uri_string)
+      uri_obj = URI(windows_safe(uri_string))
       if uri_obj.userinfo
         options[:username] = uri_obj.user unless options[:username]
         options[:password] = uri_obj.password unless options[:password]
@@ -104,5 +104,9 @@ def abort_retry?(count, options)
     def delay_retry(count)
       Kernel.sleep(2 ** count * 0.3)
     end
+
+    def windows_safe(uri)
+      uri.start_with?("http") ? uri : uri.gsub("\\", File::SEPARATOR)
+    end
   end
 end

spec/lib/pact/consumer_contract/pact_file_spec.rb

@@ -25,6 +25,15 @@ module Pact
         end
       end
 
+      describe 'with backslashes to a local path' do
+        let(:windows_path) { 'spec\support\a_consumer-a_provider.json' }
+        let(:unix_path) { 'spec/support/a_consumer-a_provider.json' }
+
+        it 'transforms them to forward slashes' do
+          expect(PactFile.read(windows_path)).to eq PactFile.read(unix_path)
+        end
+      end
+
       context 'without basic authentication' do
         before do
           stub_request(:get, uri_without_userinfo).to_return(body: pact_content)