refactor: drop mkdoc and update changelog (#2491)

* refactor: drop mkdoc

* docs: update changelog

.gitmodules

-[submodule "tools/clang"]
-	path = tools/clang
-	url = ../../wjakob/clang-cindex-python3.git

docs/changelog.rst

@@ -95,6 +95,10 @@ See :ref:`upgrade-guide-2.6` for help upgrading to the new version.
 
 Smaller or developer focused features:
 
+* Moved ``mkdoc.py`` to a new repo, `pybind11-mkdoc`_.
+
+.. _pybind11-mkdoc: https://github.com/pybind/pybind11-mkdoc
+
 * Error now thrown when ``__init__`` is forgotten on subclasses.
   `#2152 <https://github.com/pybind/pybind11/pull/2152>`_
 
@@ -102,24 +106,35 @@ Smaller or developer focused features:
   ``None``.
   `#2291 <https://github.com/pybind/pybind11/pull/2291>`_
 
-* ``py::ellipsis`` now also works on Python 2
+* ``py::ellipsis`` now also works on Python 2.
   `#2360 <https://github.com/pybind/pybind11/pull/2360>`_
 
-* Added missing signature for ``py::array``
+* Throw if conversion to ``str`` fails.
+  `#2477 <https://github.com/pybind/pybind11/pull/2477>`_
+
+* Added missing signature for ``py::array``.
   `#2363 <https://github.com/pybind/pybind11/pull/2363>`_
 
+* Pointer to ``std::tuple`` & ``std::pair`` supported in cast.
+  `#2334 <https://github.com/pybind/pybind11/pull/2334>`_
+
+* Small fixes in NumPy support. ``py::array`` now uses ``py::ssize_t`` as first
+  argument type.
+  `#2293 <https://github.com/pybind/pybind11/pull/2293>`_
+
 * Bugfixes related to more extensive testing
   `#2321 <https://github.com/pybind/pybind11/pull/2321>`_
 
 * Bug in timezone issue in Eastern hemisphere midnight fixed.
   `#2438 <https://github.com/pybind/pybind11/pull/2438>`_
 
-* Pointer to ``std::tuple`` & ``std::pair`` supported in cast.
-  `#2334 <https://github.com/pybind/pybind11/pull/2334>`_
+* ``std::chrono::time_point`` now works when the resolution is not the same as
+  the system.
+  `#2481 <https://github.com/pybind/pybind11/pull/2481>`_
 
-* Small fixes in NumPy support. ``py::array`` now uses ``py::ssize_t`` as first
-  argument type.
-  `#2293 <https://github.com/pybind/pybind11/pull/2293>`_
+* Bug fixed where ``py::array_t`` could accept arrays that did not match the
+  requested ordering.
+  `#2484 <https://github.com/pybind/pybind11/pull/2484>`_
 
 * PyPy fixes, including support for PyPy3 and PyPy 7.
   `#2146 <https://github.com/pybind/pybind11/pull/2146>`_
@@ -127,6 +142,9 @@ Smaller or developer focused features:
 * CPython 3.9 fixes.
   `#2253 <https://github.com/pybind/pybind11/pull/2253>`_
 
+* More C++20 support.
+  `#2489 <https://github.com/pybind/pybind11/pull/2489>`_
+
 * Debug Python interpreter support.
   `#2025 <https://github.com/pybind/pybind11/pull/2025>`_
 
@@ -136,6 +154,9 @@ Smaller or developer focused features:
 * NVIDIA PGI compilers now supported and tested in CI.
   `#2475 <https://github.com/pybind/pybind11/pull/2475>`_
 
+* Extensive style checking in CI, with `pre-commit`_ support.
+
+.. _pre-commit: https://pre-commit.com
 
 
 

docs/upgrade.rst

@@ -13,6 +13,12 @@ modernization and other useful information.
 v2.6
 ====
 
+The ``tools/clang`` submodule and ``tools/mkdoc.py`` have been moved to a
+standalone package, `pybind11-mkdoc`_. If you were using those tools, please
+use them via a pip install from the new location.
+
+.. _pybind11-mkdoc: https://github.com/pybind/pybind11-mkdoc
+
 An error is now thrown when ``__init__`` is forgotten on subclasses. This was
 incorrect before, but was not checked. Add a call to ``__init__`` if it is
 missing.

clang @ 6a00cbc4

-Subproject commit 6a00cbc4a9b8e68b71caf7f774b3f9c753ae84d5