Add missing `type_params` attribute for `ClassDef` node before Python3.12 #75

	name: core

	on:
	push:
	branches:
	- master
	pull_request:
	branches:
	- master
	jobs:
	build:
	strategy:
	matrix:
	python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13.0-beta.1"]
	include:
	- python-version: 3.6
	os: ubuntu-20.04
	runs-on: ${{ matrix.os \|\| 'ubuntu-latest' }}

	steps:
	- uses: actions/checkout@v3
	- name: Setup Python ${{ matrix.python-version }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install setuptools
	pip install pytest
	- name: Setup
	run: \|
	python setup.py install
	- name: Testing sequential
	run: \|
	pytest


	build-27:
	runs-on: ubuntu-20.04
	container:
	image: python:2.7.18-buster
	env:
	py27: 2.7
	steps:
	- name: Checkout code
	uses: actions/checkout@v3
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install pytest
	- name: Setup
	run: \|
	python setup.py install
	- name: Testing sequential
	run: \|
	pytest

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