[pre-commit.ci] pre-commit autoupdate (#53)

updates:
- [github.com/pre-commit/pygrep-hooks: v1.8.0 → v1.9.0](pre-commit/pygrep-hooks@v1.8.0...v1.9.0)
- [github.com/psf/black: 21.5b2 → 21.6b0](psf/black@21.5b2...21.6b0)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

.pre-commit-config.yaml

@@ -18,7 +18,7 @@ repos:
       - id: mixed-line-ending
       - id: trailing-whitespace
   - repo: https://github.com/pre-commit/pygrep-hooks
-    rev: v1.8.0
+    rev: v1.9.0
     hooks:
       - id: python-check-mock-methods
       - id: python-no-eval
@@ -29,7 +29,7 @@ repos:
     hooks:
       - id: remove-crlf
   - repo: https://github.com/psf/black
-    rev: 21.5b2
+    rev: 21.6b0
     hooks:
       - id: black
   - repo: https://github.com/asottile/blacken-docs