Bugfixes 🐛
- Ignore NeverType in subtractable types (#389), thanks @jlherren!
- Try fixing CpuCoreCounter problem (https://github.com/phpstan/phpstan-src/commit/0e3230199e5282639bc50500286bc8244ff8a748), #4147
- is_a(): specify class-string types if allow_string: true (#392), https://github.com/phpstan/phpstan/issues/4124, thanks @jiripudil!
- CallableType: accept [class-string, constant-string] array as callable (#394), https://github.com/phpstan/phpstan/issues/2880, thanks @jiripudil!
- is_a(): support class-string in parameter $class (#393), https://github.com/phpstan/phpstan/issues/2799, thanks @jiripudil!
- Support "null" and "false" pseudotypes in native unions (#400), https://github.com/phpstan/phpstan/issues/4198, https://github.com/phpstan/phpstan/issues/4179, thanks @jiripudil!