pyln-client, libplugin, rust cln-plugin: explicitly flag that we allow non-numeric JSON ids.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

contrib/pyln-client/pyln/client/plugin.py

@@ -917,6 +917,7 @@ class Plugin(object):
             'subscriptions': list(self.subscriptions.keys()),
             'hooks': hooks,
             'dynamic': self.dynamic,
+            'nonnumericids': True,
             'notifications': [
                 {"method": name} for name in self.notification_topics
             ],