add Matt as one of the admins

[malej]

@fengyanshi please add me as one of the developers/admins for this repo and testing

• [x] @mentions, #refs, [links](), formatting, and tags supported
• [x] list syntax required (any unordered or ordered list supported)
• [x] this is a complete item
• [x] this is an incomplete item

[malej]

thanks @fengyanshi for adding me... closing