Bump MSRV to 1.56 - Edition 2021 (#745)

.github/workflows/test.yml

@@ -81,8 +81,8 @@ jobs:
             rust: stable
           - name: beta
             rust: beta
-          - name: 1.53.0
-            rust: 1.53.0
+          - name: 1.56.0
+            rust: 1.56.0
 
     steps:
       - name: Checkout

CHANGELOG.md

@@ -5,7 +5,7 @@
 
 Several breaking changes were made between 0.9 and 0.10, but changes should be straightforward:
 
-* MSRV is now 1.53.0
+* MSRV is now 1.56.0
 * The `lettre_email` crate has been merged into `lettre`. To migrate, replace `lettre_email` with `lettre::message`
   and make sure to enable the `builder` feature (it's enabled by default).
 * `SendableEmail` has been renamed to `Email` and `EmailBuilder::build()` produces it directly. To migrate,

Cargo.toml

@@ -10,7 +10,8 @@ license = "MIT"
 authors = ["Alexis Mousset <contact@amousset.me>", "Paolo Barbolini <paolo@paolo565.org>"]
 categories = ["email", "network-programming"]
 keywords = ["email", "smtp", "mailer", "message", "sendmail"]
-edition = "2018"
+edition = "2021"
+rust-version = "1.56"
 
 [badges]
 is-it-maintained-issue-resolution = { repository = "lettre/lettre" }
@@ -57,7 +58,7 @@ async-std = { version = "1.8", optional = true, features = ["unstable"] }
 futures-rustls = { version = "0.22", optional = true }
 
 ## tokio
-tokio1_crate = { package = "tokio", version = "1", features = ["fs", "process", "time", "net", "io-util"], optional = true }
+tokio1_crate = { package = "tokio", version = "1", features = ["fs", "rt", "process", "time", "net", "io-util"], optional = true }
 tokio1_native_tls_crate = { package = "tokio-native-tls", version = "0.3", optional = true }
 tokio1_rustls = { package = "tokio-rustls", version = "0.23", optional = true }
 

README.md

@@ -65,7 +65,7 @@ Lettre does not provide (for now):
 
 ## Example
 
-This library requires Rust 1.53.0 or newer.
+This library requires Rust 1.56.0 or newer.
 To use this library, add the following to your `Cargo.toml`:
 
 

src/address/envelope.rs

@@ -1,6 +1,3 @@
-#[cfg(feature = "builder")]
-use std::convert::TryFrom;
-
 use super::Address;
 #[cfg(feature = "builder")]
 use crate::message::header::{self, Headers};

src/address/types.rs

@@ -1,7 +1,6 @@
 //! Representation of an email address
 
 use std::{
-    convert::{TryFrom, TryInto},
     error::Error,
     ffi::OsStr,
     fmt::{Display, Formatter, Result as FmtResult},

src/lib.rs

@@ -6,7 +6,7 @@
 //! * Secure defaults
 //! * Async support
 //!
-//! Lettre requires Rust 1.52.1 or newer.
+//! Lettre requires Rust 1.56.0 or newer.
 //!
 //! ## Features
 //!
@@ -224,8 +224,6 @@ pub(crate) type BoxError = Box<dyn StdError + Send + Sync>;
 #[cfg(test)]
 #[cfg(feature = "builder")]
 mod test {
-    use std::convert::TryFrom;
-
     use super::*;
     use crate::message::{header, header::Headers, Mailbox, Mailboxes};
 

src/message/mailbox/types.rs

@@ -1,5 +1,4 @@
 use std::{
-    convert::TryFrom,
     fmt::{Display, Formatter, Result as FmtResult, Write},
     mem,
     slice::Iter,

src/message/mod.rs

@@ -196,7 +196,7 @@
 //! ```
 //! </details>
 
-use std::{convert::TryFrom, io::Write, iter, time::SystemTime};
+use std::{io::Write, iter, time::SystemTime};
 
 pub use attachment::Attachment;
 pub use body::{Body, IntoBody, MaybeString};

src/transport/smtp/client/async_net.rs

@@ -287,8 +287,6 @@ impl AsyncNetworkStream {
 
                 #[cfg(feature = "tokio1-rustls-tls")]
                 return {
-                    use std::convert::TryFrom;
-
                     use rustls::ServerName;
                     use tokio1_rustls::TlsConnector;
 
@@ -342,8 +340,6 @@ impl AsyncNetworkStream {
 
                 #[cfg(feature = "async-std1-rustls-tls")]
                 return {
-                    use std::convert::TryFrom;
-
                     use futures_rustls::TlsConnector;
                     use rustls::ServerName;
 

src/transport/smtp/client/net.rs

@@ -1,5 +1,3 @@
-#[cfg(feature = "rustls-tls")]
-use std::convert::TryFrom;
 use std::{
     io::{self, Read, Write},
     mem,