refactor: tidy up command line in tests

[szepeviktor]

1. introduce dirname
2. proper CLI options
3. indent code
4. support Windows

Fixes #681

[szepeviktor]

@xitox97 Please run php path\to\composer run-script test:unit with this branch.

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...not really Windows junctions: Composer substitutes vendor/bin/* symlinks on Windows with POSIX shell scripts,
junctions are created by Cygwin

[canvural]

Hi,

Thank you very much for digging into this issue!

Using the dirname function is for supporting Windows? If so can you also change the usages in tests/Rules folder? For example here: https://github.com/nunomaduro/larastan/blob/master/tests/Rules/ModelPropertyRuleTest.php#L13 I believe this will fix the rest of the errors @xitox97 getting

[szepeviktor]

Using the dirname function is for supporting Windows?

No, there are several forward slashes in several paths causing no problems.
Using real PHPStan path /vendor/phpstan/phpstan/phpstan makes Windows work.
/vendor/bin/phpstan is a shell script on Windows 🤯 thus php.exe cannot execute it.

[canvural]

Thank you!