fix: process render function, exported as default #332

[0x009922]

I just commented out line node.add(';exports.default = {...exports.default};'), added simple test, and everything just works.
Perhaps, in some edge cases, you will still need to copy exports.default into yourself. Then you can try this option:

node.add(`;
  if (typeof exports.default === 'function') {
    const fn = exports.default;
    exports.default = (...args) => fn(...args);
    Object.assign(exports.default, fn)
  } else {
    exports.default = {...exports.default};
  }
`)

[lmiller1990]

Empty else block is a little weird - we can probably remove it. Anyway, Ci is green so I guess this is fine! Thanks.