fix: remove usage of go-chi v1 and upgrade v5 to 5.2.5#169

WilliamCollishaw wants to merge 2 commits intoaws:developaws/aws-lambda-runtime-interface-emulator:developfrom

WilliamCollishaw:fix/go-chi-upgradesWilliamCollishaw/aws-lambda-runtime-interface-emulator:fix/go-chi-upgradesCopy head branch name to clipboard