Support Major and Minor Version Requests

[jmcudd]

The service should support requests for Major and Minor version requests.

For example:

GET /ui/my-app/2/ should return the the latest patch release of version 2.
GET /ui/my-app/2.5/ should return the the latest patch release of version 2.5.

This will enable developers to peg their web component versions to major or minor versions while still getting any patch updates that might include security updates.