Update validation schema to work with Serverless v3#1

gligorkot wants to merge 6 commits intoJaredAAT:node16-serverless3JaredAAT/serverless-plugin-optimize:node16-serverless3from

Dave-Clark-Design-Associates:node16-serverless3Dave-Clark-Design-Associates/serverless-plugin-optimize:node16-serverless3Copy head branch name to clipboard