Update README.md

Author: danielburger1337

README.md

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+[![PHPStan](https://github.com/SBSEDV/input-converter-php/actions/workflows/phpstan.yml/badge.svg)](https://github.com/SBSEDV/input-converter-php/actions/workflows/phpstan.yml)
+[![PHPUnit](https://github.com/SBSEDV/input-converter-php/actions/workflows/phpunit.yml/badge.svg)](https://github.com/SBSEDV/input-converter-php/actions/workflows/phpunit.yml)
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 # sbsedv/input-converter
 
 A minimal PHP component to nativly support user input parsing on http methods other than POST.