Add official support for Python 3.9

Fixes #309.

4 files changed, 13 insertions, 6 deletions

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index f22ef21..c23e2d6 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -20,13 +20,14 @@ jobs:
       matrix:
         name: [
           "windows-py36",
-          "windows-py37",
+          "windows-py39",
           "windows-pypy3",
 
           "ubuntu-py36",
           "ubuntu-py36-pytestmain",
           "ubuntu-py37",
           "ubuntu-py38",
+          "ubuntu-py39",
           "ubuntu-pypy3",
           "ubuntu-benchmark",
 
@@ -39,10 +40,10 @@ jobs:
             python: "3.6"
             os: windows-latest
             tox_env: "py36"
-          - name: "windows-py37"
-            python: "3.7"
+          - name: "windows-py39"
+            python: "3.9"
             os: windows-latest
-            tox_env: "py37"
+            tox_env: "py39"
           - name: "windows-pypy3"
             python: "pypy3"
             os: windows-latest
@@ -67,6 +68,11 @@ jobs:
             os: ubuntu-latest
             tox_env: "py38"
             use_coverage: true
+          - name: "ubuntu-py39"
+            python: "3.9"
+            os: ubuntu-latest
+            tox_env: "py39"
+            use_coverage: true
           - name: "ubuntu-pypy3"
             python: "pypy3"
             os: ubuntu-latest
diff --git a/changelog/309.feature.rst b/changelog/309.feature.rst
new file mode 100644
index 0000000..b4d9569
--- /dev/null
+++ b/changelog/309.feature.rst
@@ -0,0 +1 @@
+Add official support for Python 3.9.
diff --git a/setup.py b/setup.py
index 6f7fe56..58eb11d 100644
--- a/setup.py
+++ b/setup.py
@@ -13,7 +13,7 @@ classifiers = [
     "Programming Language :: Python :: Implementation :: CPython",
     "Programming Language :: Python :: Implementation :: PyPy",
     "Programming Language :: Python :: 3 :: Only",
-] + [("Programming Language :: Python :: %s" % x) for x in "3 3.6 3.7 3.8".split()]
+] + [("Programming Language :: Python :: %s" % x) for x in "3 3.6 3.7 3.8 3.9".split()]
 
 with open("README.rst", "rb") as fd:
     long_description = fd.read().decode("utf-8")
diff --git a/tox.ini b/tox.ini
index 1f1dc9d..97b3eb7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist=linting,docs,py{36,37,38,py3},py{36,37}-pytest{master}
+envlist=linting,docs,py{36,37,38,39,py3},py{36,37}-pytest{main}
 
 [testenv]
 commands=