cargo: bump version to 0.8.1

Bump version to 0.8.0 (#1379)

Update codecov.yml: Set target to 95%

After an update to grcov, the coverage on 0.7.x has dropped slightly,
which isn't worth fixing in backport branches.

QQmlApplicationEngine: Fix needless live

0.7.1 Patch Release

v0.7.1 Patch release

release: bump version to 0.7.0

cargo: bump version to 0.6.1

cargo: ensure cxx-qt-macro has a version

bump: release to 0.5.3