fix: instantiate Result with new in resultWrapper

[achromik]

Problem

Since 3.18.0 (taxonomy support release), src/core/modules/result.js exports Result as an ES class — previously it exported a factory function (module.exports = function (object) { return new Result(object); }). However, resultWrapper() in src/core/lib/utils.js still invokes Result(...) as a plain function in 5 places.

Any success response going through resultWrapper — e.g. Stack.ContentType(...).Entry(uid).fetch() without .toJSON() — throws:

TypeError: Cannot call a class as a function

This is a regression introduced in 3.18.0 — versions <= 3.17.2 are unaffected.

Repro (offline, >= 3.24.0 where the SDK uses global fetch)

global.fetch = async () =>
  new Response(JSON.stringify({ entry: { uid: 'u1', title: 't', locale: 'en', _version: 1 } }),
    { status: 200, headers: { 'content-type': 'application/json' } });

const ContentStack = require('contentstack');
const stack = new ContentStack.Stack({ api_key: 'k', delivery_token: 't', environment: 'live' });
await stack.ContentType('list').Entry('u1').only('items', ['uid']).fetch();
// throws TypeError: Cannot call a class as a function
// after this fix: resolves correctly

For 3.18.0–3.23.x the same failure reproduces with node-fetch stubbed instead of global.fetch (those versions use the node-fetch dependency).

Fix

Add the missing new keyword at the 5 Result(...) call sites in resultWrapper().

Verified by applying the equivalent change to the built dist/node/contentstack.js and re-running the repro above — the entry resolves correctly.