5.0.1: Minor fix for priority based ordering

Ordering was broken in the previous release for health check priority. This fixes that :)

Symfony 5 support 🎉

Changes:

• Dropped php 7.1 support
• Added php 8 support
• Added symfony 5 support
• Dropped symfony <4 support

Update version constraints to limit usage to PHP 7.1

ADDS:
Unit tests now run on PHP 7.1 -> 7.4
Fixed:

Fatal errors will now not not cause the entire __health endpoint to go down
Removed:

Compatibility with PHP7.0 < (partially broken already so completely removed in this instance)

Begin refactor

Added:

• Added test suite
• Added CI pipeline for running tests
• Added branch protections for merging into master without testing
• Added a few tests for core routes and some content added in refactor
• Added health checks registry service
• Added Health check executor

Changes:

• Moved health check registering outside of the controller

Patches

• Fixed bug breaking interval overwriting for configurable health checks

Removed

• Removed composer.lock
• Removed hard dependency on eZ

Initial release

Adds the core framework for executing php health checks against the ft healthcheck standard