Quasar v1.13.1 release. Small patch release.

[rstoenescu]

https://github.com/quasarframework/quasar/releases/tag/quasar-v1.13.1

Fixes

• fix(VirtualScroll): account for 0 height scroll container size #7659 (#7660)
• fix(QRouteTab): fix some keyboard events (#7661)