Update Python versions up through 3.10 (#1398)

* Update Python versions up through 3.10 in setup.py

* Bump Python versions up to 3.10 in CI workflow

* Typo: run weekly, not weakly!

* Update readme regarding Python versions

* Quote Python versions to prevent 3.10 from becoming 3.1

* Bump readme versions to 3.8, 3.9, and 3.10

.github/workflows/config.yml

@@ -3,7 +3,7 @@ name: CI
 on:
   push:
   pull_request:
-  # Run weakly at 00:00 on Sunday.
+  # Run weekly at 00:00 on Sunday.
   schedule:
   - cron:  '0 0 * * 0'
 
@@ -14,7 +14,7 @@ jobs:
       max-parallel: 4
       matrix:
         os: [ubuntu-latest, windows-latest]
-        python-version: [3.6, 3.7, 3.8]
+        python-version: ["3.8", "3.9", "3.10"]
 
     steps:
     - uses: actions/checkout@v1

README.rst

@@ -71,7 +71,7 @@ a peer reviewed paper introducing the library (22 authors).
 Installation
 ------------
 
-The library requires Python 3.6 or greater.
+The library is tested on Python versions 3.8, 3.9, and 3.10.
 
 The simplest way to install is::
 

setup.py

@@ -29,9 +29,9 @@
     include_package_data=True,
     package_data={"": ["axelrod/data/*"]},
     classifiers=[
-        "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",
         "Programming Language :: Python :: 3 :: Only",
     ],
     python_requires=">=3.6",