Prepare release notes for 3.11

doc/history.rst

@@ -1,6 +1,22 @@
 Release history
 ===============
 
+Version 3.11
+------------
+
+- Support for SPDX license expressions and multiple license files, as detailed
+  in :pep:`639`::
+
+        license = "BSD-3-Clause"
+        license-files = ["LICENSE"]
+
+  For now, only a single license identifier is allowed. More complex expressions
+  describing multiple licenses & expressions may be supported in a future
+  version.
+- The `metadata format <https://packaging.python.org/en/latest/specifications/core-metadata/>`_
+  in produced packages is now version 2.4, to support the expanded license
+  information.
+
 Version 3.10.1
 --------------
 

doc/pyproject_toml.rst

@@ -20,13 +20,15 @@ defined by PEP 517. For any new project using Flit, it will look like this:
 .. code-block:: toml
 
     [build-system]
-    requires = ["flit_core >=3.2,<4"]
+    requires = ["flit_core >=3.11,<4"]
     build-backend = "flit_core.buildapi"
 
 Version constraints:
 
 - For now, all packages should specify ``<4``, so they won't be impacted by
   changes in the next major version.
+- ``license-files`` and license expressions in the ``license`` field require
+  ``flit_core >=3.11``.
 - :ref:`pyproject_toml_project` requires ``flit_core >=3.2``
 - :ref:`pyproject_old_metadata` requires ``flit_core >=2,<4``
 - The older :doc:`flit.ini file <flit_ini>` requires ``flit_core <3``.