adopting sort-all pre-commit git hook (#128)

Author: HGWright

.pre-commit-config.yaml

@@ -39,3 +39,9 @@ repos:
         name: isort (cython)
         types: [file, cython]
         args: [--filter-files]
+
+-   repo: https://github.com/aio-libs/sort-all
+    rev: "v1.2.0"
+    hooks:
+    - id: sort-all
+      types: [file, python]