Update docs with @stefanholek's excellent work!

Plus some minor tweaks/fixes.

Add him to the authors file and update the changelog with changes
slated for v0.10.0 .

Included but unrelated:

- Fix single-backtick to double-backtick in changelog where
  appropriate
- Update readme badges
- Update setup.py classifiers for supported pythons

AUTHORS

@@ -7,3 +7,4 @@ Ilya Kurnosov
 Philip Thiem
 Aloys Baillet
 Stephen Rosen
+Stefan Holek

README.rst

@@ -1,15 +1,15 @@
-.. image:: https://travis-ci.org/nose-devs/nose2.svg?branch=master
-    :target: https://travis-ci.org/nose-devs/nose2
-    :alt: Build Status
-
-.. image:: https://coveralls.io/repos/github/nose-devs/nose2/badge.svg?branch=master
-    :target: https://coveralls.io/github/nose-devs/nose2?branch=master
-    :alt: Coverage Status
+.. image:: https://github.com/nose-devs/nose2/workflows/build/badge.svg?event=push
+    :alt: build status
+    :target: https://github.com/nose-devs/nose2/actions?query=workflow%3Abuild
 
 .. image:: https://img.shields.io/pypi/v/nose2.svg
     :target: https://pypi.org/project/nose2/
     :alt: Latest PyPI version
 
+.. image:: https://img.shields.io/pypi/pyversions/nose2.svg
+    :alt: Supported Python Versions
+    :target: https://pypi.org/project/nose2/
+
 .. image:: https://img.shields.io/badge/Mailing%20list-discuss%40nose2.io-blue.svg
     :target: https://groups.google.com/a/nose2.io/forum/#!forum/discuss
     :alt: Join discuss@nose2.io

docs/changelog.rst

@@ -7,13 +7,54 @@ nose2 uses semantic versioning (currently in 0.x) and the popular
 Unreleased
 ----------
 
+Added
+~~~~~
+
+* Support for subtests!
+
+Notes for plugin authors about subtest support:
+
+  * Subtest failures will produce a ``TestOutcomeEvent`` with ``outcome = "subtest"``
+
+  * Subtest events can be failures, but they do not indicate success -- the
+    containing test will send a success event if no subtests fail
+
+Changed
+~~~~~~~
+
+* Drop support for Python 3.4
+
+* Python 3.8 and 3.9 are now officially supported
+
+* Improve helptext for the multiprocess plugin's ``-N`` option
+
+* When run with reduced verbosity (e.g. with ``-q``), ``nose2`` will no longer
+  print an empty line before test reports
+
+Fixed
+~~~~~
+
+* The plugin registry will no longer contain duplicate plugins and or base
+  ``event.Plugin`` instances
+
+* Fix function test case implementation of ``id``, ``__str__``, and
+  ``__repr__``. This removes the injected ``transplant_class.<locals>`` from
+  reporting output
+
+* Doctest loading will now skip ``setup.py`` files in the project root
+
+* Class methods decorated (e.g. with ``mock.patch``) are no longer incorrectly
+  picked up by the function loader
+
+    Merge pull request #485 from stefanholek/484-session-plugin-registry
+
 0.9.2
 -----
 
 Added
 ~~~~~
 
-* Add `--junit-xml-path` to the junit plugin argument list
+* Add ``--junit-xml-path`` to the junit plugin argument list
 
 Fixed
 ~~~~~
@@ -29,10 +70,10 @@ Fixed
 Changed
 ~~~~~~~
 
-* the prof plugin now uses `cProfile` instead of `hotshot` for profiling, and
-  therefore now supports python versions which do not include `hotshot`
+* the prof plugin now uses ``cProfile`` instead of ``hotshot`` for profiling, and
+  therefore now supports python versions which do not include ``hotshot``
 
-* skipped tests now include the user's reason in junit XML's `message` field
+* skipped tests now include the user's reason in junit XML's ``message`` field
 
 Fixed
 ~~~~~
@@ -48,8 +89,8 @@ Fixed
 Added
 ~~~~~
 
-* nose2.plugins.prettyassert, enabled with `--pretty-assert`, which
-  pretty-prints AssertionErrors generated by `assert` statements
+* nose2.plugins.prettyassert, enabled with ``--pretty-assert``, which
+  pretty-prints AssertionErrors generated by ``assert`` statements
 
 Changed
 ~~~~~~~
@@ -61,7 +102,7 @@ Changed
 Removed
 ~~~~~~~
 
-* Dropped support for `distutils`. Installation now requires `setuptools`
+* Dropped support for ``distutils``. Installation now requires ``setuptools``
 
 Fixed
 ~~~~~
@@ -99,12 +140,12 @@ Added
 Changed
 ~~~~~~~
 
-* Running `nose2` via `setuptools` will now trigger `CreateTestsEvent` and `CreatedTestSuiteEvent`
+* Running ``nose2`` via ``setuptools`` will now trigger ``CreateTestsEvent`` and ``CreatedTestSuiteEvent``
 
 Fixed
 ~~~~~
 
-* Respect `fail_under` in converage config
+* Respect ``fail_under`` in converage config
 * Avoid infinite recursion when loading setuptools from zipped egg
 * Manpage now renders reproducibly
 * MP doc build now reproducible

setup.py

@@ -58,10 +58,11 @@
         "License :: OSI Approved :: BSD License",
         "Programming Language :: Python",
         "Programming Language :: Python :: 2.7",
-        "Programming Language :: Python :: 3.4",
         "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
         "Operating System :: OS Independent",