Revert "SDK-977: Switch autoformatter from Black to YAPF"

This reverts commit 1ce8605.

Author: emmas-yoti

.pre-commit-config.yaml

@@ -1,11 +1,10 @@
-repos:
-- repo: https://github.com/pre-commit/mirrors-yapf
-  rev: master
+- repo: https://github.com/ambv/black
+  rev: stable
   hooks:
-      - id: yapf
+      - id: black
         language_version: python3.6
 - repo: https://github.com/pre-commit/pre-commit-hooks
-  rev: v2.2.3
+  rev: v1.2.3
   hooks:
       - id: flake8
         args: