Raise the MSRV to 1.64.0 for NonZeroUsize ops

Author: JonathanWoollett-Light

.cirrus.yml

@@ -9,7 +9,7 @@ env:
   RUSTDOCFLAGS: -D warnings
   TOOL: cargo
   # The MSRV
-  TOOLCHAIN: 1.56.1
+  TOOLCHAIN: 1.64.0
   ZFLAGS:
 
 # Tests that don't require executing the build binaries
@@ -140,18 +140,18 @@ task:
   matrix:
     - name: Linux aarch64
       arm_container:
-        image: rust:1.56
+        image: rust:1.64
       env:
         RUSTFLAGS: --cfg graviton -D warnings
         TARGET: aarch64-unknown-linux-gnu
     - name: Linux x86_64
       container:
-        image: rust:1.56
+        image: rust:1.64
       env:
         TARGET: x86_64-unknown-linux-gnu
     - name: Linux x86_64 musl
       container:
-        image: rust:1.56
+        image: rust:1.64
       env:
         TARGET: x86_64-unknown-linux-musl
   setup_script:
@@ -176,7 +176,7 @@ task:
 # Tasks for cross-compiling, but no testing
 task:
   container:
-    image: rust:1.56
+    image: rust:1.64
   env:
     BUILD: check
     HOST: x86_64-unknown-linux-gnu
@@ -250,7 +250,7 @@ task:
 
 task:
   container:
-    image: rust:1.56
+    image: rust:1.64
   env:
     BUILD: check
   name: Redox x86_64

CHANGELOG.md

@@ -33,7 +33,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 
 ### Changed
 
-- The MSRV is now 1.56.1
+- The MSRV is now 1.64.0
   ([#1792](https://github.com/nix-rust/nix/pull/1792))
 
 ### Fixed

Cargo.toml

@@ -3,7 +3,7 @@ name        = "nix"
 description = "Rust friendly bindings to *nix APIs"
 edition     = "2018"
 version     = "0.25.0"
-rust-version = "1.56"
+rust-version = "1.64"
 authors     = ["The nix-rust Project Developers"]
 repository  = "https://github.com/nix-rust/nix"
 license     = "MIT"