Update http4s-blaze-client, ... to 0.21.15#421

scala-steward wants to merge 1 commit intoclovellytech:mainclovellytech/http4s-modules:mainfrom

scala-steward:update/http4s-server-0.21.15scala-steward/http4s-modules:update/http4s-server-0.21.15Copy head branch name to clipboard