21.9 release docs (#2218)

* Beging 21.9 release docs

* Add PRs to changelog

* Change deprecation version

* Update logging tests

* Bump version

* Update changelog

setup.py

@@ -93,7 +93,7 @@ requirements = [
 ]
 
 tests_require = [
-    "sanic-testing>=0.7.0b2",
+    "sanic-testing>=0.7.0",
     "pytest==5.2.1",
     "coverage==5.3",
     "gunicorn==20.0.4",
@@ -117,9 +117,9 @@ tests_require = [
 docs_require = [
     "sphinx>=2.1.2",
     "sphinx_rtd_theme>=0.4.3",
-    "recommonmark>=0.5.0",
     "docutils",
     "pygments",
+    "m2r2",
 ]
 
 dev_require = tests_require + [