Refactored product variant gateway and added handler to load stock of…#105

Merged

niklasnatter merged 2 commits intosulu:masterfrom rs2487:feature/variant-stock-query

Sep 24, 2020

+190-35

Commits on Sep 24, 2020

Refactored product variant gateway and added handler to load stock of variant. Update Requirements and fixed codestyles and phpstan issues.
rs2487
committed
Did some refactorings after review
rs2487
committed