Bump MSRV to 1.70

It enables sparse cargo index by default, which in turn will make
performing MSRV checks locally less of a pain.

Author: Lorak-mmk

.github/workflows/rust.yml

@@ -14,7 +14,7 @@ env:
   CARGO_TERM_COLOR: always
   RUSTFLAGS: -Dwarnings
   RUST_BACKTRACE: full
-  rust_min: 1.66.0 # <- Update this when bumping up MSRV
+  rust_min: 1.70.0 # <- Update this when bumping up MSRV
 
 jobs:
   build:

README.md

@@ -3,7 +3,7 @@
 # ScyllaDB Rust Driver
 
 [![Crates.io](https://img.shields.io/crates/v/scylla.svg)](https://crates.io/crates/scylla) [![docs.rs](https://docs.rs/scylla/badge.svg)](https://docs.rs/scylla)
-[![minimum rustc version](https://img.shields.io/badge/rustc-1.66-orange.svg)](https://crates.io/crates/scylla)
+[![minimum rustc version](https://img.shields.io/badge/rustc-1.70-orange.svg)](https://crates.io/crates/scylla)
 
 This is a client-side driver for [ScyllaDB] written in pure Rust with a fully async API using [Tokio].
 Although optimized for ScyllaDB, the driver is also compatible with [Apache Cassandra®].
@@ -66,7 +66,7 @@ Ongoing efforts:
 Please join the `#rust-driver` channel on [ScyllaDB Slack] to discuss any issues or questions you might have.
 
 ## Supported Rust Versions
-Our driver's minimum supported Rust version (MSRV) is 1.66.0. Any changes will be explicitly published and will only happen during major releases.
+Our driver's minimum supported Rust version (MSRV) is 1.70.0. Any changes will be explicitly published and will only happen during major releases.
 
 ## Reference Documentation