remove casual dependency

[helfer]

Pretty straight forward. Random generator can't be seeded, but you can override the defaults to get deterministic behavior. Maybe we'll put in something seedable later.

[stubailo]

Maybe instead of random, we want static results? I feel that would make the default mocks a lot more useful for testing.

[helfer]

Idk, I would assume that for testing people will just set the mocks to what they want. It's only 5 scalar types after all.

[helfer]

I should add that making it random has the benefit of looking at least a tiny bit more realistic.

[stubailo]

@helfer I really think we should have a separate "mocking" page in the docs rather than one giant "API" page. Then it will be much easier to find code snippets and stuff.

[helfer]

You mean make mocking a third top-level thing like the tutorial and the tools section? That could certainly be done. Do you want to file an issue on the docs?