Add support for Zod .refine and .superRefine

[piotrpospiech]

This allows to pass to the ZodBridge schema that has refine or superRefine.

Example:

const schema = z
  .object({
    username: z.string().min(4),
    password: z.string().min(8),
    confirmPassword: z.string().min(8),
  })
  .refine((form) => form.password === form.confirmPassword, {
    message: "Passwords don't match",
    path: ["confirmPassword"],
  });

const schema = z
  .object({
    username: z.string().min(4),
    password: z.string().min(8),
    confirmPassword: z.string().min(8),
  })
  .superRefine((val, ctx) => {
    if (val.password !== val.confirmPassword) {
      ctx.addIssue({
        code: z.ZodIssueCode.custom,
        message: "Passwords don't match",
        path: ["confirmPassword"],
      });
    }
  });

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.56%. Comparing base (4b3f109) to head (4bdd4a0).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1319   +/-   ##
=======================================
  Coverage   94.55%   94.56%           
=======================================
  Files         231      231           
  Lines        3823     3825    +2     
  Branches     1030     1031    +1     
=======================================
+ Hits         3615     3617    +2     
  Misses         82       82           
  Partials      126      126           

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[kestarumper]

Could you add a simple test that creates the ZodBridge from a z.object(...).refine() and z.object(...).superRefine()?
Motivation: https://github.com/vazco/uniforms/pull/1319/files#annotation_20741969379