fix(deps): add pact-support to gemfile, as released gem is using git

Author: YOU54F

pact_broker/Gemfile

@@ -7,4 +7,5 @@ gem "mysql2", "~>0.3"
 gem "sqlite3", "~>2.0", force_ruby_platform: true
 gem "rake", "~> 13.0"
 gem "padrino-core", ">= 0.16.0.pre3"
-gem "sinatra", "~> 4.0"
+gem "sinatra", "~> 4.0"
+gem "pact-support"