Set up black formatter

Add black formatter and a corresponding pre-commit hook.

Issue: HIC-161
Change-Id: I8aed563114a6350cc5803f0c5232d3a20d6d6eb6
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..534d054
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,5 @@
+# Configuration for Black (https://github.com/ambv/black)
+
+[tool.black]
+line-length = 80
+