Variable makeErrorCause is redeclared and causing issues in compiler

[alanhett]

Thank you for building this library. This section of code is causing some issues:

function makeErrorCause(value, _super) {
    if (_super === void 0) { _super = makeErrorCause.BaseError; }
    return makeError(value, _super);
}
var makeErrorCause;

The function/variable makeErrorCause is declared twice, and when SWC tries to compile this module, it throws a compile error that "the name makeErrorCause is defined multiple times."

I'm not sure why the 2nd var declaration is there, but commenting it out fixes the compile error.

[tr-jason]

Same for Bun. tsc puts it there...