Bump pyo3 and lower MSRV

.github/workflows/ci.yml

@@ -143,7 +143,8 @@ jobs:
  PYTHON:
  - {VERSION: "3.9", TOXENV: "py39"}
  RUST:
- # Cover MSRV and in-dev versions
+ # Cover MSRV (and likely next MSRV) and in-dev versions
+ - 1.41.0
  - 1.45.0
  - beta
  - nightly

docs/installation.rst

@@ -105,7 +105,7 @@ Alpine
 
 .. warning::
 
- The Rust available by default in Alpine < 3.13 is older than the minimum
+ The Rust available by default in Alpine < 3.12 is older than the minimum
  supported version. See the :ref:`Rust installation instructions
  <installation:Rust>` for information about installing a newer Rust.
 
@@ -137,7 +137,7 @@ Fedora/RHEL 8/CentOS 8
 .. warning::
 
  For RHEL and CentOS you must be on version 8.3 or newer for the command
- below to install a sufficiently new Rust. If your Rust is less than 1.45.0
+ below to install a sufficiently new Rust. If your Rust is less than 1.41.0
  please see the :ref:`Rust installation instructions <installation:Rust>`
  for information about installing a newer Rust.
 
@@ -327,7 +327,7 @@ Rust
  a binary wheel and require no compiler if you have an updated ``pip``!
 
 Building ``cryptography`` requires having a working Rust toolchain. The current
-minimum supported Rust version is 1.45.0. **This is newer than the Rust most
+minimum supported Rust version is 1.41.0. **This is newer than the Rust most
 package managers ship**, so users will likely need to install with the
 instructions below.
 

setup.py

@@ -59,7 +59,7 @@
  if platform.python_implementation() == "PyPy"
  else ["pyo3/abi3-py36"]
  ),
- rust_version=">=1.45.0",
+ rust_version=">=1.41.0",
  )
  ]