Consolidate tox config into pyproject.toml

Signed-off-by: Hiroshi Miura <miurahr@linux.com>

pyproject.toml

@@ -13,3 +13,51 @@ source = ["bcj"]
 [tool.coverage.report]
 show_missing = true
 exclude_lines = ["if __name__ == .__main__.:", "pragma: no-cover", "@abstract", "def __repr__"]
+
+[tool.tox]
+legacy_tox_ini = """
+[tox]
+envlist = pypy3, py{37,38,39,310}, check, mypy
+
+[testenv]
+passenv = TRAVIS TRAVIS_* APPVEYOR APPVEYOR_* GITHUB_*
+extras = test
+commands = python -m pytest -vv -s
+
+[testenv:check]
+extras = check
+commands =
+    check-manifest {toxinidir}
+    flake8 src tests setup.py
+    isort --quiet --check-only --diff src tests setup.py
+    python setup.py sdist
+    twine check dist/*
+
+[testenv:mypy]
+extras = check
+commands = mypy src/bcj
+
+[mypy]
+warn_redundant_casts = True
+warn_unused_ignores = True
+strict_optional = True
+show_column_numbers = True
+
+[mypy-bcj.*]
+ignore_missing_imports = True
+
+[flake8]
+ignore = F841
+
+[pytest]
+python_files = test*.py
+norecursedirs = .git _build tmp* .eggs
+addopts = --cov-config=pyproject.toml --cov --cov-append
+
+[gh-actions]
+python =
+    3.7: py37
+    3.8: py38, check, mypy
+    3.9: py39
+    pypy3: pypy3
+"""