Merge pull request twilio#251 from twilio/resync-edge

Resync edge

Bump to version 5.3.0

Bump to version 5.3.0

Bump version to 5.2.0 for releasing IP Messaging SDK

Bump version

Bump version

Bump version to 6.1.0-edge for release

- Adds support for Modifying and Deleting IP Messages
- Fixes a bug with IP Messaging Create User

Bump version

Bump version

Bump version to 5.0.dev3 for release