Pre-commit update

* add codeowners
* [pre-commit.ci] pre-commit suggestions (#58)
* add badge

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

.github/CODEOWNERS

@@ -0,0 +1,21 @@
+# This is a comment.
+# Each line is a file pattern followed by one or more owners.
+
+# These owners will be the default owners for everything in
+# the repo. Unless a later match takes precedence,
+# @global-owner1 and @global-owner2 will be requested for
+# review when someone opens a pull request.
+* @borda
+
+# CI/CD and configs
+/.github/           @borda
+*.yml               @borda
+require*.txt        @borda
+
+# Docs
+/docs/                      @borda
+/.github/*.md               @borda
+/.github/ISSUE_TEMPLATE/    @borda
+
+/.github/CODEOWNERS              @borda
+/README.md                       @borda

.pre-commit-config.yaml

@@ -22,7 +22,7 @@ repos:
   #      name: fixing PEP8
 
   - repo: https://github.com/PyCQA/isort
-    rev: 5.8.0
+    rev: 5.9.1
     hooks:
       - id: isort
         name: imports

README.md

@@ -10,6 +10,7 @@
 [![CodeFactor](https://www.codefactor.io/repository/github/borda/birl/badge)](https://www.codefactor.io/repository/github/borda/birl)
 [![Language grade: Python](https://img.shields.io/lgtm/grade/python/g/Borda/BIRL.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/Borda/BIRL/context:python)
 [![codebeat badge](https://codebeat.co/badges/6dd13229-ca9e-4dae-9394-caf5f363082d)](https://codebeat.co/projects/github-com-borda-birl-master)
+[![pre-commit.ci status](https://results.pre-commit.ci/badge/github/Borda/BIRL/master.svg)](https://results.pre-commit.ci/latest/github/Borda/BIRL/master)
 
 [![Documentation Status](https://readthedocs.org/projects/birl/badge/?version=latest)](https://birl.readthedocs.io/en/latest/?badge=latest)
 [![Gitter](https://badges.gitter.im/BmImRegLnd/community.svg)](https://gitter.im/BmImRegLnd/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)