v1.13.0

TL;DR

• Sylius 1.13 support

Details

• Launch Sylius 1.13 branch 🚀 by @Rafikooo in #949
• Bump the branch-alias version by @jakubtobiasz in #952
• [Rector] Add remove unused imports by @Wojdylak in #955
• Security Config by @Rafikooo in #956
• SYL-3329 Install PayPalPlugin by @mpysiak in #958
• [Maintenance] Bump sylius/sylius-rector Package by @Rafikooo in #966
• [Maintenance] Update README file by @Wojdylak in #973
• Bump Sylius 1.13 to stable v1.13.0 version by @GSadee in #974

Full Changelog: v1.12.6...v1.13.0