Support for larger drop payloads

[lleadbet]

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Problem/Feature

Allows for the twitch event trigger drop.entitlement.grant to leverage the --cost/-C flag to pass a number of drops for the payload.

The payload will generate fresh IDs per event as to avoid causing collisions for developers, but otherwise works as advertised.

Description of Changes:

• Allows for developers to state the number of Drops per event via the above flags.

Checklist

• My code follows the Contribution Guide
• I have self-reviewed the changes being requested
• I have made comments on pieces of code that may be difficult to understand for other editors
• I have updated the documentation (if applicable)