Update .pre-commit-config.yaml to newest revisions of hooks. (#1020)

Co-authored-by: Anish Nyayachavadi <[email protected]>

Author: krisfremen

.pre-commit-config.yaml

@@ -16,11 +16,11 @@ repos:
       - id: check-merge-conflict
       - id: debug-statements
   - repo: https://github.com/timothycrosley/isort
-    rev: 5.9.2
+    rev: 5.9.3
     hooks:
       - id: isort
   - repo: https://github.com/asottile/pyupgrade
-    rev: v2.21.0
+    rev: v2.23.3
     hooks:
       - id: pyupgrade
         args: [--py36-plus]
@@ -34,7 +34,7 @@ repos:
       - id: rst-directive-colons
       - id: rst-inline-touching-normal
   - repo: https://github.com/psf/black
-    rev: 21.6b0
+    rev: 21.7b0
     hooks:
       - id: black
         args: [--safe, --quiet, --target-version=py36]