Bump version to 0.28.0

This change bumps the crate to version 0.28.0. The following notable
changes have been made since 0.27.2:
- Removed ApiError::code member after endpoint reported errors stopped
  returning it
- Renamed AuthenticationFailed variant of endpoint errors to
  NotPermitted
  - This variant is now used to signal a multitude of conditions,
    including certain order submission issues
- Bumped minimum supported Rust version to 1.63
- Bumped websocket-util dependency to 0.12
- Bumped tokio-tungstenite dependency to 0.20

Author: d-e-s-o

CHANGELOG.md

@@ -1,5 +1,5 @@
-Unreleased
-----------
+0.28.0
+------
 - Removed `ApiError::code` member after endpoint reported errors stopped
   returning it
 - Renamed `AuthenticationFailed` variant of endpoint errors to

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "apca"
-version = "0.27.2"
+version = "0.28.0"
 edition = "2021"
 rust-version = "1.63"
 authors = ["Daniel Mueller <deso@posteo.net>"]

src/lib.rs

@@ -18,7 +18,6 @@
   overflowing_literals,
   path_statements,
   patterns_in_fns_without_body,
-  private_in_public,
   proc_macro_derive_resolution_fallback,
   renamed_and_removed_lints,
   rust_2018_compatibility,