[Dev] [libre/qutebrowser] Update to v1.8.2

[bill-auger]

the separate 'pkgver' is often necessary because the different
arches do not always roll at the same speed - it is sometimes
not possible to build the same version of some package on all
three arches, because the versions of the package dependencies
may be incompatible

some programs will refuse to start if some dependency library
has a different version than the one it was built against - the
version constraints make that explicit, preventing certain of
the package dependencies from being upgraded, because doing so 
would make the program stop working