Added context and changed parameter structure to object

[supachris28]

I've added a context object (as any) to allow an error to be logged with more context information about what was going on. I've added this as a further parameter, but I've also changes it so the first parameter can either be a message or a config object to save you doing the following:

throw new ErrorCustom('it failed', 400, 1234565, null, null, { productId: '978123456789', event });

Now you can do:

throw new ErrorCustom({
  message: 'it failed',
  statusCode: 400,
  errorCode: 1234565,
  context: { productId: '978123456789', event },
});

This does have the knock on effect that statusCode and errorCode are optional in the main signature, but they are still validated to exist at runtime, but it deconstructs them from the config object first.

[supachris28]

Please read the above comment. This will require some consideration as to whether it is appropriate as is, even as a major version bump.