Migrate pytest and tox to pyproject.toml

.coveragerc

@@ -1,3 +0,0 @@
-[run]
-branch = True
-source = axes

pyproject.toml

@@ -1,2 +1,57 @@
 [build-system]
 requires = ["setuptools>=30.3.0", "wheel", "setuptools_scm"]
+
+[tool.pytest.ini_options]
+testpaths = "tests"
+addopts = "--cov axes --cov-append --cov-branch --cov-report term-missing --cov-report=xml"
+DJANGO_SETTINGS_MODULE = "tests.settings"
+
+[tool.tox]
+legacy_tox_ini = """
+[tox]
+envlist =
+    py38-djqa
+    py{36,37,38,39,py3}-dj{22,30,31,dev}
+
+[gh-actions]
+python =
+    3.6: py36
+    3.7: py37
+    3.8: py38
+    3.9: py39
+    pypy3: pypy3
+
+[gh-actions:env]
+DJANGO =
+    2.2: dj22
+    3.0: dj30
+    3.1: dj31
+    dev: djdev
+    qa: djqa
+
+# Normal test environment runs pytest which orchestrates other tools
+[testenv]
+deps =
+    -r requirements-test.txt
+    dj22: django>=2.2,<2.3
+    dj30: django>=3.0,<3.1
+    dj31: django>=3.1,<3.2
+    djdev: https://github.com/django/django/archive/master.tar.gz
+usedevelop = true
+commands = pytest
+setenv =
+    PYTHONDONTWRITEBYTECODE=1
+
+# Django development version is allowed to fail the test matrix
+[testenv:py{36,37,38,39,py3}-dj{dev}]
+ignore_errors = true
+ignore_outcome = true
+
+# QA runs type checks, linting, and code formatting checks
+[testenv:py38-djqa]
+deps = -r requirements-qa.txt
+commands =
+    mypy axes
+    prospector
+    black -t py36 --check --diff axes
+"""

pytest.ini

@@ -1,4 +0,0 @@
-[pytest]
-testpaths = tests
-addopts = --cov axes --cov-config .coveragerc --cov-append --cov-report term-missing --cov-report=xml
-DJANGO_SETTINGS_MODULE = tests.settings

tox.ini

@@ -1,46 +0,0 @@
-[tox]
-envlist =
-    py38-djqa
-    py{36,37,38,39,py3}-dj{22,30,31,dev}
-
-[gh-actions]
-python =
-    3.6: py36
-    3.7: py37
-    3.8: py38
-    3.9: py39
-    pypy3: pypy3
-
-[gh-actions:env]
-DJANGO =
-    2.2: dj22
-    3.0: dj30
-    3.1: dj31
-    dev: djdev
-    qa: djqa
-
-# Normal test environment runs pytest which orchestrates other tools
-[testenv]
-deps =
-    -r requirements-test.txt
-    dj22: django>=2.2,<2.3
-    dj30: django>=3.0,<3.1
-    dj31: django>=3.1,<3.2
-    djdev: https://github.com/django/django/archive/master.tar.gz
-usedevelop = true
-commands = pytest
-setenv =
-    PYTHONDONTWRITEBYTECODE=1
-
-# Django development version is allowed to fail the test matrix
-[testenv:py{36,37,38,39,py3}-dj{dev}]
-ignore_errors = true
-ignore_outcome = true
-
-# QA runs type checks, linting, and code formatting checks
-[testenv:py38-djqa]
-deps = -r requirements-qa.txt
-commands =
-    mypy axes
-    prospector
-    black -t py36 --check --diff axes