Test Python 3.13 (#152)

Plus a bit more Python-2-related cleanup following #149

.github/workflows/build-and-test.yml

@@ -7,7 +7,7 @@ on:
   workflow_dispatch:
 jobs:
   test:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
@@ -17,6 +17,7 @@ jobs:
           - '3.10'
           - 3.11
           - 3.12
+          - 3.13
           # As per https://github.com/actions/virtual-environments/blob/main/images/linux/Ubuntu2004-Readme.md#pypy list of versions
           - pypy-3.8
           - pypy-3.9
@@ -36,6 +37,8 @@ jobs:
             astroid-version: '<3'
           - python-version: '3.12'
             astroid-version: '<3'
+          - python-version: '3.13'
+            astroid-version: '<3'
           - python-version: 'pypy-3.10'
             astroid-version: '<3'
 
@@ -46,10 +49,10 @@ jobs:
       - uses: actions/checkout@v3
 
       - name: Set up Python ${{ matrix.python-version }}
-        if: matrix.python-version != '2.7'
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+          allow-prereleases: true
 
       - name: Install dependencies
         run: |

setup.cfg

@@ -23,6 +23,7 @@ classifiers =
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
     Programming Language :: Python :: 3.12
+    Programming Language :: Python :: 3.13
     Programming Language :: Python :: Implementation :: CPython
     Programming Language :: Python :: Implementation :: PyPy
 
@@ -32,13 +33,12 @@ install_requires =
     six >= 1.12.0
     typing; python_version < "3.5"
 setup_requires = setuptools>=44; setuptools_scm[toml]>=3.4.3
+python_requires = >=3.8
 
 [options.extras_require]
 astroid =
-    astroid >=1, <2; python_version < "3"
     astroid >=2, <4; python_version >= "3"
 test =
-    astroid >=1, <2; python_version < "3"
     astroid >=2, <4; python_version >= "3"
     pytest
     pytest-cov
@@ -47,13 +47,6 @@ test =
 [options.package_data]
 asttokens = py.typed
 
-[bdist_wheel]
-# This flag says that the code is written to work on both Python 2 and Python
-# 3. If at all possible, it is good practice to do this. If you cannot, you
-# will need to generate wheels for each Python version that you support.
-universal=1
-
-
 [tool:pytest]
 addopts = --disable-warnings --ignore=tests/testdata --strict-markers -m 'not slow'
 markers =

tox.ini

@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py{38,39,310,311,py,py3}
+envlist = py{38,39,310,311,312,313,py3}
 
 [testenv]
 commands = pytest {posargs}