Bug fixes

Fixes issue #3115574 when src attribute on image doesn't exists.

See https://www.drupal.org/project/simplecrop/issues/3115574

• Code standards
• Indicate module as d9 ready

• Issue #3115074 by Oleksandr Yushchenko, r81d3r, RajabNatshah, martinpetracek.com, lasensio: Fixed exception when locale module is enabled on Only local files should be passed to _locale_parse_js_file()

Fixes a php error caused by a wrongly initialized variable (must be array not string).

- add missing dialog library for charts

Fixing code standards and relying on releases instead of dev libraries