deps: update auth to 1.42.0-rc1 and http-client to 2.1.0-rc1#4014

diegomarquezp merged 2 commits intoprotobuf-4.x-rcgoogleapis/sdk-platform-java:protobuf-4.x-rcfrom

update-auth-and-http-clientgoogleapis/sdk-platform-java:update-auth-and-http-clientCopy head branch name to clipboard