[Bug Report] Unsupported fast-in-slow-out transition at v-progress-linear component

[kulikala]

Environment

Vuetify Version: 2.2.6
Vue Version: 2.6.11
Browsers: Firefox 72.0
OS: Mac OS 10.14

Steps to reproduce

The issue has been reported here:
#3678

but it seems the issue is still here:

vuetify/packages/vuetify/src/components/VProgressLinear/VProgressLinear.sass

Line 11 in 4fe4295

transition: .2s map-get($transition, 'fast-in-slow-out')

Expected Behavior

The $transition.fast-in-slow-out variable should have a related entry in the SASS $transition variables.

Actual Behavior

Falls back to initial transition-timing-function

Reproduction Link

https://codepen.io/kulikala/pen/KKwYpYj