Update edition to 2021

- Remove TryFrom/Into and FromIterator imports
- Prevent impl_validator_using_provider macro in sasl crate from
  constructing trait object

Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>

jid/Cargo.toml

@@ -13,7 +13,7 @@ documentation = "https://docs.rs/jid"
 readme = "README.md"
 keywords = ["xmpp", "jid"]
 license = "MPL-2.0"
-edition = "2018"
+edition = "2021"
 
 [badges]
 gitlab = { repository = "xmpp-rs/xmpp-rs" }

jid/src/lib.rs

@@ -31,7 +31,6 @@
 //!   mixing left-to-write and right-to-left characters
 
 use core::num::NonZeroU16;
-use std::convert::TryFrom;
 use std::fmt;
 use std::str::FromStr;