fix: Cleanup useless async and awaits & custom ESI Vars function doesn't have to be async#283

cdloh merged 1 commit intomaincdloh/cloudflare-esi:mainfrom

fix/customesi-doesnt-have-to-be-a-promisecdloh/cloudflare-esi:fix/customesi-doesnt-have-to-be-a-promiseCopy head branch name to clipboard