backup_migrate 5.1.5

This release contains these changes:

• #3392461 by grimreaper, shreya_th, danrod: Using empty file as ZipArchive is deprecated.
• #3357349 by damienmckenna, danrod, ivnish: Improved logging when something fails.
• #3305094 by grevil, Anybody, tamerzg, nikhil_110, xmacinfo, danrod: Log "backup restored" to watchdog after restore finished.
• #3357350 by damienmckenna, danrod: Allow forcing a scheduled backup to run via Drush.
• #3320760 by tamerzg, damienmckenna, danrod: Add encryption option to backup schedule.
• #3593967 by darren_oh, danrod: SQL mode mismatch possible.
• #3357391 by akshay_kashyap, Ashu1864, grevil, koustav_mondal, jeremy1606, kieran.cott, danrod: Fix PHPStan issues.
• #3564661 by ivnish, danrod, kieran.cott, schillerm, nitinkumar_7: Fix PHPCS issues.
• #3357392 by akshay_kashyap, vimal_nadar, damienmckenna, ravi_kant, ivnish, yusuf_khan, danrod: Address coding standard issues in README.md file that trigger warning messages.
• #3533320 by marlon.buella, ivnish, Anybody, danrod: Importing public files backup causes deprecated function error.
• #3357357 by damienmckenna, Akshaykashyap, nikhil_110, danrod: Log message after backup succeeds.
• #3577589 by astonvictor, Anybody, danrod: Caught class Drupal\backup_migrate\Drupal\Filter\Exception not found.
• #3567236 by leducdubleuet, davps, Anybody, danrod: Email Settings are not saved.
• #3548593 by anybody, LRWebks, ivnish: Add a setting to dynamically exclude data from cache tables and other unwanted sources.