feat(gems): update to pact 1.20.1

Author: bethesque

packaging/Gemfile.lock

@@ -14,7 +14,7 @@ GEM
     json (2.1.0)
     multi_xml (0.6.0)
     multipart-post (2.0.0)
-    pact (1.20.0)
+    pact (1.20.1)
       json (> 1.8.5)
       pact-mock_service (~> 2.0)
       pact-support (~> 1.2, >= 1.2.4)