defaultGemConfig.pg_query: 2.0.1 -> 2.0.2

pg_query 2.0.2 apparently has working ARM support.

This change also re-locks sqlint to use the newer version, and
generalises the platform spec to avoid being unnecessarily
restrictive.

As before, other packages which refer to pg_query are unaffected,
because they pin an older version of pg_query which is handled
separately in the gem-config expressions.

Follow-up to #116785

pkgs/development/tools/sqlint/default.nix

@@ -13,6 +13,6 @@ bundlerApp {
     homepage    = "https://github.com/purcell/sqlint";
     license     = licenses.mit;
     maintainers = with maintainers; [ ariutta nicknovitski purcell ];
-    platforms   = with platforms; [ "x86_64-linux" "x86_64-darwin" ];
+    platforms   = platforms.unix;
   };
 }