Add pyproject.toml Update manifest.in

Author: Carreau

MANIFEST.in

@@ -1,6 +1,10 @@
 include CONTRIBUTING.md
 include COPYING.md
 include README.md
+include CHANGES.txt
+include MANIFEST.in
+include pyproject.toml
+include pytest.ini
 
 # Documentation
 graft docs

README.md

@@ -153,3 +153,10 @@ with parity_check.hold_trait_notifications():
 
 However, we **recommend** that custom cross-validators don't modify the state
 of the HasTraits instance.
+
+### Release build:
+
+```bash
+$ pip install pep517
+$ python -m pep517.build .
+```

pyproject.toml

@@ -0,0 +1,3 @@
+[build-system]
+requires = ["setuptools>=40.8.0", "wheel"]
+build-backend = "setuptools.build_meta"