chore(test): use pact-ruby v2 (rust core) along ruby-core, for verifications

[YOU54F]

Use pact-ruby v2 rewrite which uses the pact-ruby-ffi gem & pact rust core to

• Verify V2 pacts (V4 is supported, but V2 chosen to test compat with pact ruby core)

Tested via Pact Broker Client

pact-foundation/pact_broker-client#198

• pact-ruby-v2 can verify v2 pacts generated by pact-rust & pact-ruby-v1
• pact-ruby-v1 can verify v2 pacts generated by pact-rust & pact-ruby-v1

[YOU54F]

👋🏾

Hey everybody

it's high time for some rework of the pact rube(y) goldberg machine

I've just released pact-ruby v1.67.x that contains a pact/v2 interface which utilises pact-ruby-ffi

Docs are here

https://github.com/pact-foundation/pact-ruby/blob/master/documentation/README_V2.md

PR for reference pact-foundation/pact-ruby#369

Lots of examples, and demos, and it's part of this RFC series, if you are curious

pact-foundation/roadmap#127

Changes to generate consumer pacts in pact_broker-client are here

pact-foundation/pact_broker-client#198

which itself has also been rewritten in Rust

https://github.com/pact-foundation/pact-broker-cli

and will be part of a consolidated cli, which will replace pact-ruby-standalone

https://github.com/YOU54F/pact-cli

[JP-Ellis]

Looking good! Just a tiny nit I noticed

[YOU54F]

lets go 🦀 🚀