Remove dependency on pbr. Update metadata to resolve from declarative…

… config in setup.cfg. Fixes #218.

pyproject.toml

@@ -0,0 +1,3 @@
+[build-system]
+requires = ["setuptools>=56"]
+build-backend = "setuptools.build_meta"

setup.cfg

@@ -2,14 +2,13 @@
 name = requests-mock
 author = Jamie Lennox
 author_email = jamielennox@gmail.com
-summary = Mock out responses from the requests package
-description_file = README.rst
+description = Mock out responses from the requests package
+long_description = file:README.rst
 license = Apache-2
-license_file = LICENSE
-home_page = https://requests-mock.readthedocs.io/
+url = https://requests-mock.readthedocs.io/
 project_urls =
     Source = https://github.com/jamielennox/requests-mock
-classifier =
+classifiers =
     Development Status :: 5 - Production/Stable
     Intended Audience :: Developers
     Intended Audience :: Information Technology
@@ -25,11 +24,13 @@ classifier =
     Programming Language :: Python :: Implementation :: CPython
     Programming Language :: Python :: Implementation :: PyPy
     Topic :: Software Development :: Testing
-test_suite = tests
 
-[files]
+[options]
 packages = requests_mock
-package-data = requests_mock = py.typed, *.pyi
+include_package_data = true
+install_requires =
+    requests>=2.22,<3
+    six
 
 [build_sphinx]
 all_files = 1
@@ -39,11 +40,11 @@ source-dir = doc/source
 [bdist_wheel]
 universal = 1
 
-[extras]
+[options.extras_require]
 fixture =
   fixtures
 
-[entry_points]
+[options.entry_points]
 pytest11 =
     requests_mock = requests_mock.contrib._pytest_plugin
 

tox.ini

@@ -13,9 +13,7 @@ commands =
     pytest tests/pytest
     python -m testtools.run {posargs:discover}
 deps =
-    -r{toxinidir}/requirements.txt
     -r{toxinidir}/test-requirements.txt
-    pbr
 
 [testenv:pep8]
 commands = flake8 requests_mock tests