misc: add pre-commit configuration

.git-blame-ignore-revs

@@ -1,2 +1,4 @@
 # trivial: apply black
 f7348a846db550c42f14c637f9ef6403bc65327d
+# trivial: apply new pre-commit configuration (isort & pyupgrade)
+6ced0d2180409c6f7a0dfd5055a388de61d07dff

.pre-commit-config.yaml

@@ -6,3 +6,17 @@ repos:
     hooks:
     - id: black
       args: ['--target-version', 'py37', '--skip-string-normalization', '--line-length', '110']
+-   repo: https://github.com/PyCQA/isort
+    rev: 5.7.0
+    hooks:
+    - id: isort
+      args: ['--profile', 'black', '--line-length', '110']
+-   repo: https://github.com/asottile/pyupgrade
+    rev: v2.20.0
+    hooks:
+    - id: pyupgrade
+      args: ['--keep-percent-format', '--py37-plus']
+-   repo: https://git.entrouvert.org/pre-commit-debian.git
+    rev: v0.1
+    hooks:
+    - id: pre-commit-debian