Bump MSRV to 1.57 for const panic

CHANGELOG.md

@@ -23,7 +23,7 @@
 
 ## Breaking Changes
 
-* #1399 Bump MSRV to 1.51.
+* #1400 Bump MSRV to 1.57.
 * #1399 Thread support is now required on all platforms.
 * #1135 The "no_metrics" anti-feature has been replaced with
   the "metrics" positive feature.

README.md

@@ -161,7 +161,7 @@ extreme::run(async move {
 
 # minimum supported Rust version (MSRV)
 
-We support Rust 1.51.0 and up.
+We support Rust 1.57.0 and up.
 
 # architecture
 

scripts/cross_compile.sh

@@ -12,10 +12,10 @@ rustup update --no-self-update
 
 RUSTFLAGS="--cfg miri" cargo check
 
-rustup toolchain install 1.51.0 --no-self-update
+rustup toolchain install 1.57.0 --no-self-update
 cargo clean
 rm Cargo.lock
-cargo +1.51.0 check
+cargo +1.57.0 check
 
 for target in $targets; do
   echo "setting up $target..."