Add Expr Throw - PHP 8

[janatjak]

Add support for PHP 8 Throw Expression

Example:

$value = $nullableValue ?? throw new InvalidArgumentException();

[pepakriz]

@janatjak Thank you. Can you include/improve tests to cover this case?

If I see correctly, this PR resolves #145

[janatjak]

@pepakriz

yes, this PR should resolves expression problems
tests added

[janatjak]

@pepakriz i fixed lint error with matrix.php-version == '8.0'

is it ok or do you have another suggestion how to solve this issue?

[pepakriz]

@janatjak I think CI is failing because the project depends on a very old version of php_codesniffer.

[pepakriz]

@janatjak I'm taking it back. Your solution is OK

[janatjak]

@janatjak I'm taking it back. Your solution is OK

thanks, btw phpstan fixed