chore(1.x): release 1.8.0 (#28)

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String bytes (#26)

* KB != 1024B

* string bytes length

style(php-cs-fixer): fix coding standards

Merge pull request #21: Update code style and metafiles

[fix] DatetimeChecker::valid fix for brute values (#18)

* [fix] DatetimeChecker::valid fix for brute values

* oops

* php 8.1 workaround

* typo fix

* rollback phpStorm formatter changes

[fix] DatetimeChecker error message for: after, before (#17)

Add Singleton attribute instead of SingletonInterface (#15)

TypeChecker::boolean add option for strict comparison (#14)

MixedChecker add `accepted` adn `declined` for handle forms and GET b…

…ool-like values (#13)

BooleanChecker for check concrete boolean value (#11)