update dashmate role with platform protocol version

[vivekgsharma]

Issue being fixed or feature implemented

We should be able to use specific platform protocol versions

What was done?

• Add the initial_platform_protocol_version: 1 variable to set initial protocol version. The latest will be used if not set.

How Has This Been Tested?

On Testnet

Breaking Changes

None

Checklist:

• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have added or updated relevant unit/integration/functional/e2e tests
• [x] I have made corresponding changes to the documentation

For repository code-owners and collaborators only

• [x] I have assigned this pull request to a milestone