Fixes to allow const assertions in nativeEnum

[mokocm]

Bug Description

Zod can use const enum in z.nativeEnum() , but zod-to-json-schema did not parse them correctly.

• https://github.com/colinhacks/zod#native-enums

// input
const values = {
  val1: 1,
  val2: 2,
} as const

const actualValues = Object.values(values).filter(
    (_, i) => i >= numberValues.length
);

console.log({
    type:
      numberValues.length === 0
        ? "string"
        : numberValues.length === actualValues.length
        ? "number"
        : ["string", "number"],
    enum: actualValues,
  })
// output
// {
//   "type": [
//     "string",
//     "number"
//   ],
//   "enum": []
// } 

Fix

Fixed to correctly parse both in the case of enum and const enums object.