v1.0.0-beta28-1.20.4

As this is still a beta version, this version can contain bugs. Feel free to report ANY misbehaviours and errors!## Features

• remove metal detector helper in favor of Skyblocker's implementation

Bug Fixes

• remove ktor content negotiation
  • this also fixes compatibility with Firmanent as they are using an outdated version of it

Technical changes

none