correct cabal-flags support
.cabal: disable test-merge-deps as it fails to buid

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
point to own cabal fork
submodule update
submodule update
cabal submodule update
cabal submodule update
Warning-dirven Code-Maid
submoule update: forbid cabal to self update
cabal submodule update (rebase)