Use beta enumeration value https://openactive.io/ns-beta#Member

[nickevansuk]

Issue

Use beta enumeration value (https://openactive.io/ns-beta#Member). See https://www.openactive.io/ns-beta/ for more information.

This should be updated in both SessionSeries and ScheduleSession offers.

Example

Not like this:

{
  "type": "Offer",
  "price": 0,
  "priceCurrency": "GBP",
  "eligibleCustomerType": "Member",
  "identifier": "SINGLE-MEMBER",
  "name": "Single session (Member)"
}

Like this:

{
  "type": "Offer",
  "price": 0,
  "priceCurrency": "GBP",
  "eligibleCustomerType": "https://openactive.io/ns-beta#Member",
  "identifier": "SINGLE-MEMBER",
  "name": "Single session (Member)"
}

[nickevansuk]

Looks good