RUST-1445 Bump MSRV to 1.57 (#727)

Author: abr-egn

.evergreen/config.yml

@@ -1480,9 +1480,9 @@ axes:
   - id: "extra-rust-versions"
     values:
       - id: "min"
-        display_name: "1.56 (minimum supported version)"
+        display_name: "1.57 (minimum supported version)"
         variables:
-          RUST_VERSION: "1.56.0"
+          RUST_VERSION: "1.57.0"
           MSRV: true
       - id: "nightly"
         display_name: "nightly"

README.md

@@ -32,7 +32,7 @@ For more detailed documentation, see [the manual](https://mongodb.github.io/mong
 
 ## Installation
 ### Requirements
-- Rust 1.56+
+- Rust 1.57+
 - MongoDB 3.6+
 
 ### Importing
@@ -369,7 +369,7 @@ Commits to main are run automatically on [evergreen](https://evergreen.mongodb.c
 
 ## Minimum supported Rust version (MSRV)
 
-The MSRV for this crate is currently 1.56.0. This will be rarely be increased, and if it ever is,
+The MSRV for this crate is currently 1.57.0. This will be rarely be increased, and if it ever is,
 it will only happen in a minor or major version release.
 
 ## License

manual/src/README.md

@@ -33,5 +33,5 @@ tokio::time::timeout(Duration::from_secs(5), handle).await???;
 
 ## Minimum supported Rust version (MSRV)
 
-The MSRV for this crate is currently 1.56.0. This will be rarely be increased, and if it ever is,
+The MSRV for this crate is currently 1.57.0. This will be rarely be increased, and if it ever is,
 it will only happen in a minor or major version release.

src/lib.rs

@@ -8,7 +8,7 @@
 //! # Installation
 //!
 //! ## Requirements
-//! - Rust 1.56+
+//! - Rust 1.57+
 //! - MongoDB 3.6+
 //!
 //! ## Importing
@@ -284,7 +284,7 @@
 //!
 //! ## Minimum supported Rust version (MSRV)
 //!
-//! The MSRV for this crate is currently 1.56.0. This will be rarely be increased, and if it ever is,
+//! The MSRV for this crate is currently 1.57.0. This will be rarely be increased, and if it ever is,
 //! it will only happen in a minor or major version release.
 
 #![warn(missing_docs)]