convert global objects falsely if they are exported

[xiechao06]

take package gloabl for example:

// file: document.js
var topLevel = typeof global !== 'undefined' ? global :
    typeof window !== 'undefined' ? window : {}
var minDoc = require('min-document');

if (typeof document !== 'undefined') {
    module.exports = document;
} else {
    var doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4'];

    if (!doccy) {
        doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4'] = minDoc;
    }

    module.exports = doccy;
}

when using in browser, the object document actually is window.document, but since it is exported, the last snippet is converted to (notice document is changed to document$1):

var document$1 = createCommonjsModule(function (module) {
    var topLevel = typeof commonjsGlobal !== 'undefined' ? commonjsGlobal :
        typeof window !== 'undefined' ? window : {}
    var minDoc = interopDefault(require$$0$18);

    if (typeof document$1 !== 'undefined') {
        module.exports = document$1;
    } else {
        var doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4'];

        if (!doccy) {
            doccy = topLevel['__GLOBAL_DOCUMENT_CACHE@4'] = minDoc;
        }

        module.exports = doccy;
    }
});

[Rich-Harris]

Sorry for the long wait, this is finally fixed in 5.0.1. Side-note: that package is hilarious.