Run all pre-commit hooks on pull requests (#236)

Help to ensure new code contributions meet the coding standards of the
project.

.github/workflows/test.yml

@@ -3,8 +3,19 @@ name: Python package
 on: [push, pull_request]
 
 jobs:
-  build:
+  lint:
+    runs-on: ubuntu-latest
 
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+    - name: Install dependencies
+      run: python -m pip install pre-commit
+    - name: Run pre-commit
+      run: pre-commit run --all-files
+
+  build:
     runs-on: ubuntu-latest
     strategy:
       matrix:

.pre-commit-config.yaml

@@ -9,4 +9,4 @@ repos:
   rev: 21.8b0
   hooks:
   - id: black
-    language_version: python3.6
+    args: ["--target-version", "py36"]

setup.py

@@ -29,10 +29,10 @@ def readme():
     license="LGPL",
     keywords=["encoding", "i18n", "xml"],
     project_urls={
-        'Documentation': 'https://chardet.readthedocs.io/',
-        'GitHub Project': 'https://github.com/chardet/chardet',
-        'Issue Tracker': 'https://github.com/chardet/chardet/issues'
-    },    
+        "Documentation": "https://chardet.readthedocs.io/",
+        "GitHub Project": "https://github.com/chardet/chardet",
+        "Issue Tracker": "https://github.com/chardet/chardet/issues",
+    },
     classifiers=[
         "Development Status :: 5 - Production/Stable",
         "Intended Audience :: Developers",