Make uniforms context an interface instead of a type

[wadamek65]

It would be best to convert this type into an interface so that it can be extended as needed when using uniforms.

Our use case is that we have a custom bridge that implements additional custom methods. We then use this bridge (schema) by using the useForm hook within a field and calling the method within that component. Now, since the schema returned is of default type Bridge, this method does not exist in types and produces a type error. The current workaround is to either ignore the error or cast the type.

[radekmie]

I looked into it, and I don't think it'll cover your need - you won't be able to override this property anyway (TypeScript playground). Or maybe I don't see something?