https://github.com/pact-foundation/pact-js-core/issues/392 created this to fix a validation issue for ^10.x.x of pact-js (13.7.3 of pact-js-core) where the validation for customProviderHeaders fails and doesn't match the types. I think there may be other issues given the test coverage around validateOptions.ts, but I have to finish up for the day so I don't have the time to look at it now @Matt (pactflow.io / pact-js / pact-go)

Thanks Adam - appreciate your patience (and determination) on this. I’ve just merged and will release another patch now.