Refs #32355 -- Bumped minimum supported versions of 3rd-party packages.

This bumps minimum supported versions of 3rd-party packages to the first
releases to support Python 3.8.

docs/internals/contributing/writing-code/unit-tests.txt

@@ -277,24 +277,24 @@ If you want to run the full suite of tests, you'll need to install a number of
 dependencies:
 
 *  aiosmtpd_
-*  argon2-cffi_ 19.1.0+
+*  argon2-cffi_ 19.2.0+
 *  asgiref_ 3.6.0+ (required)
 *  bcrypt_
 *  colorama_
 *  docutils_
 *  geoip2_
-*  jinja2_ 2.7+
+*  jinja2_ 2.11+
 *  numpy_
-*  Pillow_ 6.2.0+
+*  Pillow_ 6.2.1+
 *  PyYAML_
 *  pytz_ (required)
 *  pywatchman_
-*  redis_
+*  redis_ 3.4+
 *  setuptools_
 *  memcached_, plus a :ref:`supported Python binding <memcached>`
 *  gettext_ (:ref:`gettext_on_windows`)
 *  selenium_
-*  sqlparse_ 0.2.3+ (required)
+*  sqlparse_ 0.3.1+ (required)
 *  tblib_ 1.5.0+
 
 You can find these dependencies in `pip requirements files`_ inside the

docs/releases/4.2.txt

@@ -486,7 +486,7 @@ Miscellaneous
 * The ``alias`` argument for :meth:`.Expression.get_group_by_cols` is removed.
 
 * The minimum supported version of ``sqlparse`` is increased from 0.2.2 to
-  0.2.3.
+  0.3.1.
 
 * The undocumented ``negated`` parameter of the
   :class:`~django.db.models.Exists` expression is removed.
@@ -510,6 +510,19 @@ Miscellaneous
 * The minimum supported version of ``mysqlclient`` is increased from 1.4.0 to
   1.4.3.
 
+* The minimum supported version of ``argon2-cffi`` is increased  from 19.1.0 to
+  19.2.0.
+
+* The minimum supported version of ``Pillow`` is increased from 6.2.0 to 6.2.1.
+
+* The minimum supported version of ``jinja2`` is increased from 2.9.2 to
+  2.11.0.
+
+* The minimum supported version of `redis-py`_ is increased from 3.0.0 to
+  3.4.0.
+
+.. _`redis-py`: https://pypi.org/project/redis/
+
 .. _deprecated-features-4.2:
 
 Features deprecated in 4.2