Fix Avalonia Build, update packages

[ChrisPulman]

What kind of change does this PR introduce?

FIx

What is the current behavior?

Avalonia is outdated

What is the new behavior?

Updated Avalonia

What might this PR break?

None expected

Please check if the PR fulfills these requirements

• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)

Other information: