Fix ResultSetHeader casting for postgres result compatibility

src/lib/db.ts

@@ -115,7 +115,7 @@ export async function execResult(
 			serverStatus: 0,
 			warningStatus: 0,
 			changedRows: 0,
-		} as ResultSetHeader;
+		} as unknown as ResultSetHeader;
 	}
 	return {
 		affectedRows: 0,
@@ -125,7 +125,7 @@ export async function execResult(
 		serverStatus: 0,
 		warningStatus: 0,
 		changedRows: 0,
-	};
+	} as unknown as ResultSetHeader;
 }
 
 export async function affectedRows(query: SQL | string): Promise<number> {