Burn for Mintable ERC-20

[rymcol]

Description

Implement burn method for the mintable ERC-20

Motivation and Context

Required for the current prototype

How Has This Been Tested?

manually

Types of changes (remove all unchecked types)

• New feature (non-breaking change which adds functionality)

Checklist:

• If my change requires a change to the documentation, I have updated the documentation accordingly, and in either case, have checked this box to attest to my assessment of this requirement with regard to my change.
• If my change requires additions or updates to any deployment scripts to ensure that the protocol is functional (Makefile, Dockerfile, Forge Script, etc.), I have made these changes, and in either case, have checked this box to attest to my assessment of this requirement with regard to my change.
• If my change requires additional test coverage, I have created those tests accordingly, and in either case, have checked this box to attest to my assessment of this requirement with regard to my change.