bypassExportMapItem = async (packageDir, exportMapKey, exportMapValue) => {
  const exportMapValuePath = path.join(packageDir, exportMapValue);
  const exportMapKeyPath = path.join(packageDir, exportMapKey);
  // TODO: css import assertions, use generic export map resolver from providence?
  const searchPattern = isDirectorySync(exportMapValuePath)
    ? path.join(exportMapValuePath, '**', '*.js')
    : exportMapValuePath;
  const filePaths = await globby(searchPattern);
  // @ts-ignore
  return asyncConcurrentForEach(filePaths, async filePath => {
    const outputFilePath = filePath.replace(exportMapValuePath, exportMapKeyPath);
    const outputDir = path.dirname(outputFilePath);
    const fileName = path.basename(filePath);
    const exportsDir = path.dirname(filePath);
    await makeDir(outputDir);
    return generateAdjustedExportFile(fileName, exportsDir, outputDir);
  });
}
@param {string} packageDir
@param {string} exportMapKey
@param {string} exportMapValue
@returns {Promise<any>}