Update psql drop_command to force dropdb

The reason behind it is to improve developer experience, as right now when
running a command like `hanami db reset` it will fail if the user has any other
ongoing connection, like a connection to db client(like dbeaver), or a `hanami
console` session.

lib/hanami/cli/commands/app/db/utils/postgres.rb

@@ -23,7 +23,7 @@ def create_command
 
               # @api private
               def drop_command
-                system(cli_env_vars, "dropdb #{escaped_name}")
+                system(cli_env_vars, "dropdb --force #{escaped_name}")
               end
 
               # @api private