Update versions for tools used in pre-commit checks. Add a badge. (#674)

Author: Diptorup Deb

.pre-commit-config.yaml

@@ -8,17 +8,17 @@ repos:
         pass_filenames: false
         args: ["-r", "dpctl", "-lll"]
 -   repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v2.3.0
+    rev: v4.0.1
     hooks:
     -   id: end-of-file-fixer
     -   id: trailing-whitespace
 -   repo: https://github.com/psf/black
-    rev: 21.4b2
+    rev: 21.10b0
     hooks:
     -   id: black
         exclude: "versioneer.py|dpctl/_version.py"
 -   repo: https://github.com/pycqa/isort
-    rev: 5.8.0
+    rev: 5.10.1
     hooks:
     -   id: isort
         name: isort (python)
@@ -29,7 +29,7 @@ repos:
         name: isort (pyi)
         types: [pyi]
 -   repo: https://gitlab.com/pycqa/flake8
-    rev: 3.9.1
+    rev: 4.0.1
     hooks:
     -   id: flake8
 -   repo: https://github.com/pocc/pre-commit-hooks

README.md

@@ -1,5 +1,6 @@
 [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
 [![Imports: isort](https://img.shields.io/badge/%20imports-isort-%231674b1?style=flat&labelColor=ef8336)](https://pycqa.github.io/isort/)
+[![pre-commit](https://img.shields.io/badge/pre--commit-enabled-brightgreen?logo=pre-commit&logoColor=white)](https://github.com/pre-commit/pre-commit)
 [![Coverage Status](https://coveralls.io/repos/github/IntelPython/dpctl/badge.svg?branch=master)](https://coveralls.io/github/IntelPython/dpctl?branch=master)
 
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