move to VARCHAR for postgres

Signed-off-by: Enrique Lacal <[email protected]>

Author: EnriqueL8

db/migrations/postgres/000117_update_contractlisteners_add_filters_column.up.sql

@@ -1,5 +1,5 @@
 BEGIN;
 ALTER TABLE contractlisteners ADD COLUMN filters TEXT;
 -- changing the length of varchar does not affect the index
-ALTER TABLE contractlisteners ALTER COLUMN signature TYPE VARCHAR(MAX); 
+ALTER TABLE contractlisteners ALTER COLUMN signature TYPE VARCHAR; 
 COMMIT;