Put coverage config into pyproject.toml

.coveragerc

@@ -1,12 +0,0 @@
-[run]
-branch = True
-source =
-    attr
-
-[paths]
-source =
-   src
-   .tox/*/site-packages
-
-[report]
-show_missing = True

pyproject.toml

@@ -3,6 +3,18 @@ requires = ["setuptools>=40.6.0", "wheel"]
 build-backend = "setuptools.build_meta"
 
 
+[tool.coverage.run]
+parallel = true
+branch = true
+source = ["attr"]
+
+[tool.coverage.paths]
+source = ["src", ".tox/*/site-packages"]
+
+[tool.coverage.report]
+show_missing = true
+
+
 [tool.black]
 line-length = 79
 

setup.py

@@ -39,7 +39,7 @@ INSTALL_REQUIRES = []
 EXTRAS_REQUIRE = {
     "docs": ["sphinx", "zope.interface"],
     "tests": [
-        "coverage",
+        "coverage[toml]",
         "hypothesis",
         "pympler",
         "pytest>=4.3.0",  # 4.3.0 dropped last use of `convert`

tox.ini

@@ -50,7 +50,7 @@ commands = coverage run --parallel -m pytest {posargs}
 [testenv:coverage-report]
 basepython = python3.7
 skip_install = true
-deps = coverage
+deps = coverage[toml]
 commands =
     coverage combine
     coverage report