Add pre-commit hook for check-manifest
Why: This brings back functionality removed in prior commits
@@ -41,3 +41,8 @@ repos:
types: [file]
# The errors flagged in NEWS.rst are old.
exclude: NEWS.rst
+
+- repo: https://github.com/mgedmin/check-manifest
+ rev: '0.39'
+ hooks:
+ - id: check-manifest
