Bump pre-commit hook versions.

Author: domdfcoding

.pre-commit-config.yaml

@@ -41,12 +41,12 @@ repos:
       files: ^domdf_python_tools/.*\.py$
 
  - repo: https://github.com/pre-commit/pygrep-hooks
-   rev: v1.5.1
+   rev: v1.7.0
    hooks:
     - id: python-no-eval
 
  - repo: https://github.com/asottile/pyupgrade
-   rev: v2.7.3
+   rev: v2.7.4
    hooks:
     - id: pyupgrade
       args: