add T_MATCH to increments

[epic-64]

Subject:
I would like to use this package to report cognitive complexity.
In my codebase I use match() a lot, which was introduced in PHP 8.0.
It is similar to switch and from what I can tell, should get the same treatment.

Changes:

• added T_MATCH to increments in src/CognitiveComplexity/Analyzer.php
• added test for match construct in tests/Data/function11.php.inc
• increased minimum required version of squizlabs/php_codesniffer to 3.6.0

Additional changes (necessary):

• lift dependency of PHP version from ^7.2 to ^8.0 (where T_MATCH is introduced)

Additional changes (optional):

• Added a Dockerfile and docker-compose.yml for easy local testing (using composer image)
• Added phpunit to dev-dependencies for local testing
• Applied suggested changes to phpunit.xml using vendor/bin/phpunit tests --migrate-configuration

[jrfnl]

lift dependency of PHP version from ^7.2 to ^8.0 (where T_MATCH is introduced)

That sound completely unnecessary to me. PHP_CodeSniffer backfills the T_MATCH token since PHPCS 3.6.0 (all the way back to PHP 5.4). So the only thing needed would be to raise the minimum PHPCS version to 3.6.0 (or later).

Applied suggested changes to phpunit.xml using vendor/bin/phpunit tests --migrate-configuration

Not a good idea as that will prevent the tests from running on PHPUnit < 9.3 and with a PHP minimum of PHP 7.2, PHPUnit 8.x is still needed.

[epic-64]

I was not aware of the backwards compatibility in PHPCS. I removed the unnecessary upgrades

[Rarst]

1. Please remove Docker files, I am not sure why would they be necessary or relevant to the PR.
2. I've approved the test to run for PR and setup is currently crashing over PHPUnit 9 being required in the changed lock and not compatible with composer.json.
3. Actually please drop requiring PHPUnit. It's not relevant to the enhancement and I don't have it in me to ponder changes to the setup right now.

[epic-64]

Adding PHPUnit and the dockerfiles were necessary for me to get anything working locally, specifically composer install and phpunit tests.

I did now add the docker files to my excludes so that they are no longer added to the repo. As for PHPunit, I removed that but can no longer test locally. I suppose there is some way to install and use it globally, will investigate this.

Anyway I removed the unnecessary changes

[Rarst]

Cheers!

FYI personally I have multiple versions of PHPUnit set up as PHARs in the system. I can have a lot of projects around, and sometimes within same IDE session, so zillion copies of PHPUnit can get hard on IDE and making sense of what's going on. More so if tests are supposed to work with multiple PHPUnit versions.