support for akka 2.6.0

[cheatmenot]

I have tried to use akka-http-json with akka 2.6.0 but when I try to assemble it (sbt-assembly) it says, it can't because of this version conflicts, Thanks!

[warn] Found version conflict(s) in library dependencies; some are suspected to be binary incompatible:
[warn] * com.typesafe.akka:akka-stream_2.12:2.6.0 is selected over 2.5.25
[warn] +- com.typesafe.akka:akka-persistence_2.12:2.6.0 () (depends on 2.6.0)
[warn] +- com.typesafe.akka:akka-stream-typed_2.12:2.6.0 () (depends on 2.6.0)
[warn] +- com.typesafe.akka:akka-remote_2.12:2.6.0 () (depends on 2.6.0)
[warn] +- de.heikoseeberger:akka-http-circe_2.12:1.29.1 (depends on 2.5.25)

[Heiko Seeberger]

Which version of akka-http-json did you use?

[cheatmenot]

the latest release 1.29.1 - de.heikoseeberger:akka-http-circe_2.12:1.29.1 (depends on 2.5.25)

[Heiko Seeberger]

Released 1.30.0

[cheatmenot]

thanks @hseeberger!