Update README (#40)

Author: n-rodriguez

README.md

@@ -49,7 +49,7 @@ useful for encryption without a higher-level encryption protocol built on top of
 
 **x25519.rb** is supported on and tested against the following platforms:
 
-- MRI 2.5, 2.6, 2.7, 3.0
+- MRI 2.7, 3.0, 3.1, 3.2, 3.3, 3.4
 
 ## Installation
 
@@ -271,8 +271,8 @@ The optimized [rfc7748_precomputed] implementation was designed by:
 
 ## License
 
-Copyright (c) 2017-2018 Armando Faz
-Copyright (c) 2017-2021 Tony Arcieri
+* Copyright (c) 2017-2018 Armando Faz
+* Copyright (c) 2017-2025 Tony Arcieri
 
 This gem is available as open source under the terms of the
 BSD-3 Clause License ([LICENSE](./LICENSE))