haskellPackages.hackage-db: 2.1.2 -> 2.1.3

This update adds support for $CABAL_DIR as well as the new
$XDG_CACHE_HOME location of the hackage db.

Since we maintain hackage-db, having the latest version always is nice
even though it has more reverse dependencies than the other libraries we
maintain.

maintainers/scripts/haskell/update-stackage.sh

@@ -58,6 +58,7 @@ sed -r \
     -e '/ distribution-nixpkgs /d' \
     -e '/ jailbreak-cabal /d' \
     -e '/ language-nix /d' \
+    -e '/ hackage-db /d' \
     -e '/ cabal-install /d' \
     -e '/ lsp /d' \
     -e '/ lsp-types /d' \