Update the minimal rust version

.github/workflows/ci.yml

@@ -8,11 +8,11 @@ jobs:
     strategy:
       matrix:
         rust:
-          - 1.59.0
           - 1.60.0
           - 1.61.0
           - 1.62.1
           - 1.63.0
+          - 1.64.0
           - stable
           - beta
           - nightly

README.md

@@ -79,7 +79,7 @@ man =(curl -sSf "https://raw.githubusercontent.com/breard-r/acmed/main/man/en/ta
 
 ## Build from source
 
-In order to compile ACMEd, you will need the [Rust](https://www.rust-lang.org/) compiler and its package manager, Cargo. The minimal required Rust version is 1.59, although it is recommended to use the latest stable one.
+In order to compile ACMEd, you will need the [Rust](https://www.rust-lang.org/) compiler and its package manager, Cargo. The minimal required Rust version is 1.60, although it is recommended to use the latest stable one.
 
 ACMEd depends OpenSSL 1.1.0 or higher.