enh(build): +pyproject.toml w/ Black excludes; gitignore venvs!

Author: ankostis

.gitignore

@@ -7,7 +7,10 @@ __pycache__/
 
 # Distribution / packaging
 .Python
-env/
+/env*/
+/.env*/
+/venv*/
+/.venv*/
 build/
 develop-eggs/
 dist/

pyproject.toml

@@ -0,0 +1,23 @@
+[build-system]
+requires = ["setuptools>=30.3.0", "wheel"]
+
+[tool.black]
+## Also `.gitignore` is sourced.
+exclude = '''
+    /(
+        \.eggs
+        |\.git
+        |\.hg
+        |\.mypy_cache
+        |\.pytype
+        |\.nox
+        |\.tox
+        |build
+        |_build
+        |buck-out
+        |dist
+        |.vscode/.+
+    )/ | (
+    \..*cache.*
+    )
+'''