Bug fixes

Fix for running from a Drupal installation.

This release reflects the following bug fixes/requests:
#3114297 by Wadator: Config Schema Missing
#3112698 by Rithesh BK: Read me documentation is not according to standard and maintainers details is not available
#3128737 by kapilkumar0324: Drupal 9 Compatibility

Properly initialize http header if no header provided

Bug fixes and Updates

Run the export as the user who requested it so that webform_last_download table gets updated correctly.