proj: MSRV 1.61 -> 1.63

We're seeing more of our deps move to this MSRV or higher (e.g.
`webpki`, `rustls-platform-verifier`) and it's shipped in Debian stable.
Time to move our MSRV to 1.63.

.github/workflows/build.yml

@@ -102,7 +102,7 @@ jobs:
 
       - uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: "1.61"
+          toolchain: "1.63"
 
       - run: cargo check --locked --lib --all-features -p rustls
 

README.md

@@ -57,7 +57,7 @@ to a wider set of architectures and environments, or compliance requirements.  S
 Specifying `default-features = false` when depending on rustls will remove the
 dependency on aws-lc-rs.
 
-Rustls requires Rust 1.61 or later.
+Rustls requires Rust 1.63 or later.
 
 [ring-target-platforms]: https://github.com/briansmith/ring/blob/2e8363b433fa3b3962c877d9ed2e9145612f3160/include/ring-core/target.h#L18-L64
 [`crypto::CryptoProvider`]: https://docs.rs/rustls/latest/rustls/crypto/struct.CryptoProvider.html

rustls/Cargo.toml

@@ -2,7 +2,7 @@
 name = "rustls"
 version = "0.23.5"
 edition = "2021"
-rust-version = "1.61"
+rust-version = "1.63"
 license = "Apache-2.0 OR ISC OR MIT"
 readme = "../README.md"
 description = "Rustls is a modern TLS library written in Rust."

rustls/src/lib.rs

@@ -24,7 +24,7 @@
 //! Specifying `default-features = false` when depending on rustls will remove the
 //! dependency on aws-lc-rs.
 //!
-//! Rustls requires Rust 1.61 or later.
+//! Rustls requires Rust 1.63 or later.
 //!
 //! [ring-target-platforms]: https://github.com/briansmith/ring/blob/2e8363b433fa3b3962c877d9ed2e9145612f3160/include/ring-core/target.h#L18-L64
 //! [`crypto::CryptoProvider`]: crate::crypto::CryptoProvider