postgresqlPackages.pv_ivm: 1.11 -> 1.12

Release Notes:
https://github.com/sraoss/pg_ivm/releases/tag/v1.12

Adds support for PostgreSQL 18.

pkgs/servers/sql/postgresql/ext/pg_ivm.nix

@@ -7,13 +7,13 @@
 
 postgresqlBuildExtension (finalAttrs: {
   pname = "pg_ivm";
-  version = "1.11";
+  version = "1.12";
 
   src = fetchFromGitHub {
     owner = "sraoss";
     repo = "pg_ivm";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-fPtDwP+IZ/RQOriRklSvpUnJ8qEwJaxIrcfnAReRQeQ=";
+    hash = "sha256-UeRcxoUkpPw4EcQXKUxHamjczOaE59d00kSrYsijnH8=";
   };
 
   meta = {
@@ -23,11 +23,5 @@ postgresqlBuildExtension (finalAttrs: {
     maintainers = with lib.maintainers; [ ivan ];
     platforms = postgresql.meta.platforms;
     license = lib.licenses.postgresql;
-    # PostgreSQL 18 support issue upstream: https://github.com/sraoss/pg_ivm/issues/133
-    # Note: already fixed on `main` branch.
-    # Check after next package update.
-    broken = lib.warnIf (finalAttrs.version != "1.11") "Is postgresql18Packages.pg_ivm still broken?" (
-      lib.versionAtLeast postgresql.version "18"
-    );
   };
 })