Release of PHP Extension v5.0.44

• Bugfix: Fatal Errors were counted as a request with error in Tideways, even when they were catched and gracefully handled by user.
• Bugfix: Fix post install script for Plesk installations with PHP 7.3
• Bugfix: Changes to tideways.timeout INI variable had no effect
• Improvement: Add Error_Processor#process503 as error function to Magento instrumentation.