Since they are already removed from the repo

[skip-ci]

This requires Qt 5.9 (to calculate overshoot).
The default scroll behaviour of list views has far too much inertia.
This should make scrolling feel more like scrolling the other scroll
areas of nheko.

- Update version numbers and documentation
- Fix github releases oauth key

This reverts commit 4b807229.

projects.

Update the appveyor configuration to no longer use mujx keys.

Travis-CI keys still need to be updated.