Add plugin release Update Manager Client

[xxsimoxx]

All Submissions:

• [X] Have you followed the Classic Commerce Contributing guideline?
• [X] Does your code follow the repo standards?
• [X] Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changes proposed in this Pull Request:

1. Update the Update client to latest version (Last modified on Update Manager release: 2.4.0).
2. Added filters that points to the right location of images.
3. Added filter to handle plugin usage statistics privacy opt-out.

Closes #211 .

Maybe (that is not already added) we should limit the download of a new version from this repo?