adds missing version parameter to verify-subscription

[lleadbet]

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

Problem/Feature

288 flagged that --version didn't work for twitch event verify-subscription. This was due to a missing entry into the parameters- it should correctly pass through as needed to avoid this in the future.

Description of Changes:

• Adds version to the verify-subscription parameters as needed.

Checklist

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