Merge pull request #7 from JanPalen/feature/OP-446-upgrade-plugin-to-…

…sylius-1.13-support

Upgrade plugin to Sylius 1.13 compatibility

Sylius 1.11 support (#4)

* Add Sylius 1.11 support

* Update build

* Fix spec test

* Fix build

* Add missing space

* Add Sylius version to build name and bump node version

* Fix typo in build name

* Add Sylius version restrict to build

Co-authored-by: Jakub 'Wolen' Tobiasz <80641364+jakubtobiasz@users.noreply.github.com>

Merge pull request #3 from xNordo/feature/update-readme

Update README and file headers

Fix tests

Fixes

Fix return type

Update README.md

Update README.md