Bump MSRV

.github/workflows/CICD.yml

@@ -1,7 +1,7 @@
 name: CICD
 
 env:
-  MIN_SUPPORTED_RUST_VERSION: "1.39.0"
+  MIN_SUPPORTED_RUST_VERSION: "1.40.0"
   CICD_INTERMEDIATES_DIR: "_cicd-intermediates"
 
 on:

Cargo.lock

@@ -1,7 +1,5 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
-
 [[package]]
 name = "aho-corasick"
 version = "0.7.18"

README.md

@@ -122,7 +122,7 @@ or Windows Terminal since Windows 10 1903).
 
 ### Via cargo
 
-If you have Rust 1.39 or higher, you can install `hexyl` from source via `cargo`:
+If you have Rust 1.40 or higher, you can install `hexyl` from source via `cargo`:
 ```
 cargo install hexyl
 ```