fix: alter config table value

Author: venki91

lib/index.js

@@ -157,7 +157,7 @@ class ErrsolePostgres extends EventEmitter {
     ];
 
     const alterQueries = [
-      `ALTER TABLE ${this.configTable} ALTER COLUMN value SET NOT NULL`
+      `ALTER TABLE ${this.configTable} ALTER COLUMN value TYPE TEXT, ALTER COLUMN value SET NOT NULL`
     ];
 
     for (const query of queries) {