Update `primitive` and `vector` packages

 - `primitive` is updated to upstream's HEAD which is essentially
   `primitive-0.5.1.0`, plus a core-lint-error workaround for #8355 and
   some minor cleanups.

 - `vector` is updated to upstreams `vector-0.10.9.1` release

Note: The upstream repo location has changed to GitHub,
      hence the update in the `packages` file

Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>
Implement an unlifted Proxy type, Proxy#

A value of type 'Proxy# a' can only be created through the new,
primitive witness 'proxy# :: Proxy# a' - a Proxy# has no runtime
representation and is thus free.

This lets us clean up the internals of TypeRep, as well as Adam's future
work concerning records (by using a zero-width primitive type.)

Authored-by: Edward Kmett <ekmett@gmail.com>
Authored-by: Austin Seipp <austin@well-typed.com>
Signed-off-by: Austin Seipp <austin@well-typed.com>
Make typeRep_RDR use typeRep# instead of typeRep

Authored-by: Edward Kmett <ekmett@gmail.com>
Authored-by: Austin Seipp <austin@well-typed.com>
Signed-off-by: Austin Seipp <austin@well-typed.com>
Fix manual regarding current state of implicit quantification

See also #4426
Release notes: mention -XEmptyCase
Update library refs
Merging master
Removes tabs