Replace pep517.build with build (#37)

* Replace pep517.build with build

Resolves #30

* Prefer simple usage
Co-authored-by: Jason R. Coombs <jaraco@jaraco.com>

tox.ini

@@ -24,7 +24,7 @@ commands =
 [testenv:release]
 skip_install = True
 deps =
-	pep517>=0.5
+	build
 	twine[keyring]>=1.13
 	path
 	jaraco.develop>=7.1
@@ -35,6 +35,6 @@ setenv =
 	TWINE_USERNAME = {env:TWINE_USERNAME:__token__}
 commands =
 	python -c "import path; path.Path('dist').rmtree_p()"
-	python -m pep517.build .
+	python -m build
 	python -m twine upload dist/*
 	python -m jaraco.develop.create-github-release