Did the websocket message payload keys change to lowercase? #28

It looks like the websocket message keys changed to lower case, is that possible? I had to adapt my relay to account for that change: gr2m/github-webhook-relay#5

Instead of

• Header
• Body
• DeliveryID
• RequestID

The keys now seem to be

• header
• body
• delivery_id
• request_id

Can you confirm?