Missing decrement method in events

[alexsegura]

The decrement method is not managed by the bundle.

Consider the following configuration:

m6_statsd:
  clients:
    default:
      events:
        order.accepted:
          decrement: "orders.waiting"

It causes the following error:

Unrecognized option "decrement" under "m6_statsd.clients.default.events.order.accepted"

I'll send a pull request shortly.

[omansour]

correct 👍

txs