fix(deps): use rack-reverse-proxy pact-foundation fork

- update to rack-test 2.1.0

packaging/Gemfile

@@ -10,4 +10,6 @@ gem "webrick", "1.9.0"
 # we require gem locking for gems with native extensions
 # due to lack of windows support
 gem "json", "2.7.1"
-gem "bigdecimal", "3.1.5"
+gem "bigdecimal", "3.1.5"
+gem 'rack-reverse-proxy', git: 'https://github.com/pact-foundation/rack-reverse-proxy.git',
+                          branch: 'feat/rack_2_and_3_compat'

packaging/Gemfile.lock

@@ -1,3 +1,13 @@
+GIT
+  remote: https://github.com/pact-foundation/rack-reverse-proxy.git
+  revision: 7ed51994123363a6969da5c6c89e04320715494b
+  branch: feat/rack_2_and_3_compat
+  specs:
+    rack-reverse-proxy (1.0.0.pre.unreleased)
+      rack (>= 3.0, < 4.0)
+      rack-proxy (~> 0.6, >= 0.6.1)
+      rackup (~> 2.0)
+
 GEM
   remote: https://rubygems.org/
   specs:
@@ -87,9 +97,6 @@ GEM
     rack (3.1.8)
     rack-proxy (0.7.7)
       rack
-    rack-reverse-proxy (0.12.0)
-      rack (>= 1.0.0)
-      rack-proxy (~> 0.6, >= 0.6.1)
     rack-test (2.1.0)
       rack (>= 1.3)
     rackup (2.2.1)
@@ -149,6 +156,7 @@ DEPENDENCIES
   pact-mock_service (= 3.12.3)
   pact-provider-verifier (= 1.39.0)
   pact_broker-client (= 1.77.0)
+  rack-reverse-proxy!
   webrick (= 1.9.0)
 
 BUNDLED WITH