http4s-argonaut publishes against argonaut-6.2 as of v0.15. Some people still need argonaut-6.1. This is for those people.
Replace...
"org.http4s" %% "http4s-argonaut" % http4sVersion
... with:
"org.http4s" %% "http4s-argonaut61" % http4sVersion
Backport of http4s-argonaut to argonaut-6.1