Raise min version to PHP 7.3, check compatibility PHP 8.3.

[terabytesoftw]

Q	A
Is bugfix?	❌
New feature?	✔️
Breaks BC?	❌

[what-the-diff]

PR Summary

• Changes in Workflow File
  The workflow file was updated to trigger upon any new changes in the 'master' branch. Moreover, it now utilizes the latest PHPUnit testing setup and additional extensions for image manipulation have been added for more comprehensive testing scenarios.

• Composer Specification Modification
  The minimum required PHP version has been increased to 7.3 for better performance and compatibility. Also, a more recent version of PHPUnit is required, allowing the use of the latest testing features.

• Updates in Test Files
  The testing functions were updated in several files to assure compatibility with the recent changes. The'void' return type was added in setup and teardown methods of various testing files, enhancing readability and aligning with coding best practices. One of the tests now anticipates a distinct error message for invalid driver inputs.

• File Deletion
  In an effort to keep our codebase clean and up-to-date, an obsolete compatibility file has been deleted.

These changes aim to modernize our infrastructure and improve the efficiency and reliability of our testing.

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