Add Pimcore 11 support & add missing type hints (#7)

* Add Pimcore 11 support & add missing type hints - resolves #3

* Apply php-cs-fixer changes

* Add Pimcore 11 support & add missing type hints - add payment brick

Co-authored-by: dvesh3 <dvesh3@users.noreply.github.com>

Author: dvesh3