Qt 5.11 was downgraded to 5.9 because of two issues:
- spawns errors like
```
qrc:/qml/SignInWaiting.qml:20:9: QML BusyIndicator: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead.
qrc:/qml/SignInWaiting.qml:26:9: QML Text: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead.
qrc:/qml/SignInWaiting.qml:20:9: QML BusyIndicator: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead.
qrc:/qml/SignInWaiting.qml:26:9: QML Text: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead.
qrc:/qml/SignInWaiting.qml:20:9: QML BusyIndicator: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead.
qrc:/qml/SignInWaiting.qml:26:9: QML Text: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead.
qrc:/qml/SignInWaiting.qml:20:9: QML BusyIndicator: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead.
qrc:/qml/SignInWaiting.qml:26:9: QML Text: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead.
qrc:/qml/SignInWaiting.qml:20:9: QML BusyIndicator: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead.
qrc:/qml/SignInWaiting.qml:26:9: QML Text: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead.
```
- Google login doesn't work. It just doesn't start embedded webbrowser
Most dependencies are vendored in the upstream source anyway,
deps.nix just contains the few that are not.
Dependencies were updated manually because go2nix doesn't
work correctly for this package - it produces an empty deps.nix.
Build failed after update to 4.4.0 because the tests are incorrectly
packages in the pypi version.
Switch to upstream github repo, fix tests, disable failing test cases