Parenthesis wrapped exports break

[trbrc]

For exports wrapped in parenthesis it seems the open paren is removed but the close paren is kept, causing Rollup to fail and throw cryptic errors. Version 5.0.4, Rollup 0.36.0.

Input:

module.exports = (1);

Output:

var example = 1);

export default example;
export { example as __moduleExports };

[trbrc]

I just noticed #120, so I'm closing this.