Support Python 3.10

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
           - "3.7"
           - "3.8"
           - "3.9"
-          # - "3.10"  # FIXME: broken due to `collections.Iterable` issue; see #330 / #624 / etc.
+          - "3.10"
     steps:
       - uses: actions/checkout@v1
       - name: Set up Python ${{ matrix.python-version }}

setup.py

@@ -92,5 +92,9 @@ setup(
         '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 :: 3.10',
     ],
 )

tox.ini

@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py27, py35, py36, py37, py38, py39
+envlist = py27, py35, py36, py37, py38, py39, py310
 
 [gh-actions]
 python =
@@ -14,6 +14,7 @@ python =
     3.7: py37
     3.8: py38
     3.9: py39
+    3.10: py310
 
 [testenv]
 commands = py.test -vv