41: Added contextual and handling

[TitouanVanBelle]

This PR brings contextual And handling as suggested in #41

Given a scenario with the following steps

Given a given state
And another given state

The second step another given state can be defined the following ways

Given(@"another given state", ^(NSArray<NSString *> *args, NSDictionary *userInfo) {});
And(@"another given state", ^(NSArray<NSString *> *args, NSDictionary *userInfo) {});

[brentleyjones]

So this essentially makes a statement like And(@"another given state", ^(NSArray<NSString *> *args, NSDictionary *userInfo) {}); a catch all And, correct? Would be good to update documentation to reflect this, and recommend that existing And or Match(@[x,@"And"] be migrated to just x.

[TitouanVanBelle]

Sorry what do you mean with 'a catch all And'? I updated the documentation locally but I'm not sure how to push it or create a PR for it. Any suggestion?

[brentleyjones]

Ahh, a deprecation is better than what I was thinking 👍.