GSL v4.1.0 (#1163)

Fixes: #1161

Update version strings in README and CMakeLists.txt.

CMakeLists.txt

@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.14...3.16)
 
-project(GSL VERSION 4.0.0 LANGUAGES CXX)
+project(GSL VERSION 4.1.0 LANGUAGES CXX)
 
 add_library(GSL INTERFACE)
 add_library(Microsoft.GSL::GSL ALIAS GSL)

README.md

@@ -197,7 +197,7 @@ include(FetchContent)
 
 FetchContent_Declare(GSL
     GIT_REPOSITORY "https://github.com/microsoft/GSL"
-    GIT_TAG "v4.0.0"
+    GIT_TAG "v4.1.0"
     GIT_SHALLOW ON
 )