Update version of nth used.

MODULE.bazel

@@ -1,3 +1,3 @@
 bazel_dep(name = "abseil-cpp", repo_name = "com_google_absl", version = "20230125.1")
 bazel_dep(name = "bazel_skylib", repo_name = "bazel_skylib", version = "1.4.2")
-bazel_dep(name = "nth-cc", repo_name = "nth_cc", version = "20240221.00")
+bazel_dep(name = "nth-cc", repo_name = "nth_cc", version = "20240602.00")

README.md

@@ -28,8 +28,8 @@ but is not required to, use in their instruction set.
 
 ## Building from Source
 
-Jasmin is a collection of C++20 libraries, and relies heavily on Bazel for
-building and testing. You will need a C++20-compliant compiler and a relatively
+Jasmin is a collection of C++23 libraries, and relies heavily on Bazel for
+building and testing. You will need a C++23-compliant compiler and a relatively
 recent copy of [Bazel](https://bazel.build/). Specifically,
 
 * Bazel version 5.4.0 or greater

bazel/BUILD

@@ -34,6 +34,7 @@ cc_toolchain_config(
         "-Wextra",
         "-Wpedantic",
         "-Wuninitialized",
+        "-Wno-c++2b-extensions",
         "-Wno-gcc-compat",
         "-Wno-sign-compare",
     ]
@@ -62,6 +63,7 @@ cc_toolchain_config(
         "-Wextra",
         "-Wpedantic",
         "-Wuninitialized",
+        "-Wno-c++2b-extensions",
         "-Wno-gcc-compat",
         "-Wno-sign-compare",
     ]