title: pglogical.replicate_ddl_command quote handling
body: <p>Provider is on OEL 7 postgres 12.4 and Subscriber in on RDS 13.2</p>
  <p>pglogical.replicate_ddl_command works fine as long as there are no quotes between start and end of the command.
  for example, below works fine</p>
  <pre><code>select pglogical.replicate_ddl_command('create table public.foo ( like public.orders including all)','{default}'::text[]);
  </code></pre>
  <p>Event triggers are setup to add this newly created table to default replication_set.</p>
  <p>Next, we need to attach table foo as a partition to table orders, and that's where quotes in FOR VALUES become a problem.</p>
  <pre><code>select pglogical.replicate_ddl_command('Alter table public.orders attach partition public.foo for values from ('2021-05-01') TO ('2021-06-01')','{default}'::text[]);
  ERROR:  syntax error at or near &quot;2021&quot;
  LINE 1: ...ers attach partition public.foo for values from ('2021-05-01...
   
                                                            ^
  </code></pre>
  <p>Could not find anything in docs related to this.
  please help.</p>