Bump kiwisolver and pillow minvers

Author: ksunden

doc/api/next_api_changes/development/24919-KS.rst

@@ -1,4 +1,18 @@
-Support for Python 3.8 dropped
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Increase to minimum supported versions of dependencies
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-For Matplotlib 3.8, the minimum supported version of Python is 3.9.
+For Matplotlib 3.8, the :ref:`minimum supported versions <dependencies>` are
+being bumped:
+
++------------+-----------------+---------------+
+| Dependency |  min in mpl3.7  | min in mpl3.8 |
++============+=================+===============+
+|   Python   |       3.8       |      3.9      |
++------------+-----------------+---------------+
+| kiwisolver |       1.0.1     |      1.3.1    |
++------------+-----------------+---------------+
+|   Pillow   |       6.2.1     |      8.0      |
++------------+-----------------+---------------+
+
+This is consistent with our :ref:`min_deps_policy` and `NEP29
+<https://numpy.org/neps/nep-0029-deprecation_policy.html>`__

requirements/testing/minver.txt

@@ -2,11 +2,11 @@
 
 contourpy==1.0.1
 cycler==0.10
-kiwisolver==1.0.1
+kiwisolver==1.3.1
 importlib-resources==3.2.0
 numpy==1.20.0
 packaging==20.0
-pillow==6.2.1
+pillow==8.0.0
 pyparsing==2.3.1
 python-dateutil==2.7
 fonttools==4.22.0