add @taveras to maintainers list within the README

[taveras]

This change adds @taveras to the maintainers list.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Chore, documentation, cleanup

Motivation and Context

This is for internal Condé Nast clarification regarding who is maintaining a repository.

Checklist:

• My code follows the code style of this project.
• I have updated the documentation (if required).
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[coveralls]

Pull Request Test Coverage Report for Build 290

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 281:	0.0%
Covered Lines:	60
Relevant Lines:	60

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💛 - Coveralls