Replaced macos-13 with macos-15 in GitHub Actions.

The macos-13 image is retired, macos-15 is now available.

.github/workflows/ci.yml

@@ -303,12 +303,12 @@ jobs:
               - libc++-18-dev
               - libc++abi-18-dev
 
-          - toolset: clang
-            cxxstd: "11,14,17,20,2b"
-            os: macos-13
           - toolset: clang
             cxxstd: "11,14,17,20,2b"
             os: macos-14
+          - toolset: clang
+            cxxstd: "11,14,17,20,23"
+            os: macos-15
 
     timeout-minutes: 30
     runs-on: ${{matrix.os}}

README.md

@@ -18,8 +18,8 @@ Boost.Parameter, part of collection of the [Boost C++ Libraries](https://github.
 
 Branch          | GitHub Actions | AppVeyor | Test Matrix | Dependencies |
 :-------------: | -------------- | -------- | ----------- | ------------ |
-[`master`](https://github.com/boostorg/parameter/tree/master) | [![GitHub Actions](https://github.com/boostorg/parameter/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/boostorg/parameter/actions?query=branch%3Amaster) | [![AppVeyor](https://ci.appveyor.com/api/projects/status/e9iptg55otiv040a/branch/master?svg=true)](https://ci.appveyor.com/project/Lastique/parameter/branch/master) | [![Tests](https://img.shields.io/badge/matrix-master-brightgreen.svg)](http://www.boost.org/development/tests/master/developer/parameter.html) | [![Dependencies](https://img.shields.io/badge/deps-master-brightgreen.svg)](https://pdimov.github.io/boostdep-report/master/parameter.html)
-[`develop`](https://github.com/boostorg/parameter/tree/develop) | [![GitHub Actions](https://github.com/boostorg/parameter/actions/workflows/ci.yml/badge.svg?branch=develop)](https://github.com/boostorg/parameter/actions?query=branch%3Adevelop) | [![AppVeyor](https://ci.appveyor.com/api/projects/status/e9iptg55otiv040a/branch/develop?svg=true)](https://ci.appveyor.com/project/Lastique/parameter/branch/develop) | [![Tests](https://img.shields.io/badge/matrix-develop-brightgreen.svg)](http://www.boost.org/development/tests/develop/developer/parameter.html) | [![Dependencies](https://img.shields.io/badge/deps-develop-brightgreen.svg)](https://pdimov.github.io/boostdep-report/develop/parameter.html)
+[`master`](https://github.com/boostorg/parameter/tree/master) | [![GitHub Actions](https://github.com/boostorg/parameter/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/boostorg/parameter/actions?query=branch%3Amaster) | [![AppVeyor](https://ci.appveyor.com/api/projects/status/e9iptg55otiv040a/branch/master?svg=true)](https://ci.appveyor.com/project/Lastique/parameter/branch/master) | [![Tests](https://img.shields.io/badge/matrix-master-brightgreen.svg)](https://regression.boost.io/master/developer/parameter.html) | [![Dependencies](https://img.shields.io/badge/deps-master-brightgreen.svg)](https://pdimov.github.io/boostdep-report/master/parameter.html)
+[`develop`](https://github.com/boostorg/parameter/tree/develop) | [![GitHub Actions](https://github.com/boostorg/parameter/actions/workflows/ci.yml/badge.svg?branch=develop)](https://github.com/boostorg/parameter/actions?query=branch%3Adevelop) | [![AppVeyor](https://ci.appveyor.com/api/projects/status/e9iptg55otiv040a/branch/develop?svg=true)](https://ci.appveyor.com/project/Lastique/parameter/branch/develop) | [![Tests](https://img.shields.io/badge/matrix-develop-brightgreen.svg)](https://regression.boost.io/develop/developer/parameter.html) | [![Dependencies](https://img.shields.io/badge/deps-develop-brightgreen.svg)](https://pdimov.github.io/boostdep-report/develop/parameter.html)
 
 ### License