Loyalties Program support

[bandraszyk]

Add support for new methods related to Loyalty Programs.

Validation namespace:

• Validate Validation Rules: POST /validation-rules/:rule-id/validation - Docs

Rewards namespace:

• List: GET /rewards - Docs
• Create: POST /rewards - Docs
• Get: GET /rewards/:rewardId - Docs
• Update: PUT /rewards/:rewardId - Docs
• Delete: DELETE /rewards/:rewardId - Docs
• List Assignments: GET /rewards/:rewardId/assignments - Docs
• Create Assignment: POST /rewards/:rewardId/assignments - Docs
• Update Assignment: PUT /rewards/:rewardId/assignments/:assignmentId - Docs
• Delete Assignment: DELETE /rewards/:rewardId/assignments/:assignmentId - Docs

Loyalties namespace:

• List: GET /loyalties - Docs
• Create: POST /loyalties - Docs
• Get: GET /loyalties/:campaignId - Docs
• Update: PUT /loyalties/:campaignId - Docs
• Delete: DELETE /loyalties/:campaignId - Docs
• List Reward Assignments: GET /loyalties/:campaignId/rewards - Docs
• Create Reward Assignment: POST /loyalties/:campaignId/rewards - Docs
• Update Reward Assignment: PUT /loyalties/:campaignId/rewards/:assignmentId - Docs
• Delete Reward Assignment: DELETE /loyalties/:campaignId/rewards/:assignmentId - Docs
• List Earning Rules: GET /loyalties/{campaignId}/earning-rules - Docs
• Create Earning Rules: POST /loyalties/:campaignId/earning-rules - Docs
• Update Earning Rules: PUT /loyalties/:campaignId/earning-rules/:earningRuleId - Docs
• Delete Earning Rules: DELETE /loyalties/:campaignId/earning-rules/:earningRuleId - Docs
• List Members: GET /loyalties/:campaignId/members - Docs
• Add Member: POST /loyalties/:campaignId/members - Docs
• Get Member: GET /loyalties/:campaignId/members/:memberId - Docs
• Add Points: POST /loyalties/:campaignId/members/:memberId/balance - Docs
• Redeem Reward: POST /loyalties/:campaignId/members/:memberId/redemption - Docs

[bandraszyk]

Redemption:

• Redeem Voucher, added reward property: Docs
• Redeem Voucher (client), added reward property Docs

Events:

• Track Event, added loyalty property Docs
• Track Event (client), added loyalty property Docs

[imvanzen]

@bandraszyk I created a PR which adds new methods to the SDK https://github.com/voucherifyio/voucherify-nodejs-sdk/pull/95

@frakti Let's make a review in advance so that we have time to introduce any improvements that you propose. Particularly noteworthy are the methods for redeeming rewards and adding points in the loyalties namespace.

[tpindel]

@bandraszyk I guess we can close the ticket, can't we?