Merge lp:~cjwatson/storm/py39 into lp:storm

[Colin Watson]

Support Python 3.9.

[Ioana Lasc (ilasc)]

review: Approve

=== modified file 'NEWS'
--- NEWS	2021-04-06 09:23:02 +0000
+++ NEWS	2021-04-16 11:40:29 +0000
@@ -8,6 +8,7 @@
   Comparable.endswith, and Comparable.contains_string.  This is only
   supported in the PostgreSQL backend.
 - Restore MySQL support.
+- Support Python 3.9.
 
 0.24 (2020-06-12)
 =================
 
=== modified file 'setup.py'
--- setup.py	2021-04-06 09:23:02 +0000
+++ setup.py	2021-04-16 11:40:29 +0000
@@ -74,6 +74,7 @@
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
         "Topic :: Database",
         "Topic :: Database :: Front-Ends",
         "Topic :: Software Development :: Libraries :: Python Modules",
 
=== modified file 'tox.ini'
--- tox.ini	2021-04-06 08:17:42 +0000
+++ tox.ini	2021-04-16 11:40:29 +0000
@@ -5,6 +5,7 @@
     py36-{cextensions,nocextensions}
     py37-{cextensions,nocextensions}
     py38-{cextensions,nocextensions}
+    py39-{cextensions,nocextensions}
     docs
 
 [testenv]
@@ -23,7 +24,7 @@
 
 [testenv:docs]
 basepython =
-    python3.8
+    python3.9
 commands =
     sphinx-build -b html -d storm/docs/_build/doctrees storm/docs storm/docs/_build/html
 deps =