Bump MSRV to match Cargo.toml

.github/workflows/test.yml

@@ -31,7 +31,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        rust: [stable, 1.67.1]
+        rust: [stable, 1.70.0]
     steps:
       - name: Checkout
         uses: actions/checkout@v3

README.md

@@ -3,7 +3,7 @@
 [test status]: https://img.shields.io/github/actions/workflow/status/staticintlucas/keyset-rs/test.yml?branch=main&label=tests&style=flat-square
 [test coverage]: https://img.shields.io/codecov/c/gh/staticintlucas/keyset-rs?style=flat-square
 [crate version]: https://img.shields.io/crates/v/keyset?style=flat-square
-[rust version]: https://img.shields.io/badge/rust-1.67%2B-informational?style=flat-square
+[rust version]: https://img.shields.io/badge/rust-1.70%2B-informational?style=flat-square
 
 [actions]: https://github.com/staticintlucas/keyset-rs/actions?query=branch%3Amain
 [codecov]: https://app.codecov.io/github/staticintlucas/keyset-rs
@@ -12,7 +12,7 @@
 A (WIP) reimplementation of [pykeyset] in Rust for improved performance.
 Eventually this aims to become the backend for pykeyset using a Python wrapper around this project.
 
-Current minimum supported Rust version is 1.67.0, although this is subject to change as development continues.
+Current minimum supported Rust version is 1.70.0, although this is subject to change as development continues.
 
 [pykeyset]: https://github.com/staticintlucas/pykeyset