v0.5.0 — German Unity Edition

Changed

• Update dependencies

  [dependencies]
  http-types = "2.12"
  opentelemetry = "0.16"
  opentelemetry-semantic-conventions = "0.8"
  surf = "2.3"

Cosmetic

• Use Rust 1.54's new feature to include the README content into the crate doc via a macro call;
  see https://blog.rust-lang.org/2021/07/29/Rust-1.54.0.html#attributes-can-invoke-function-like-macros