Update pre-commit for py3.8+

.pre-commit-config.yaml

@@ -25,7 +25,7 @@ repos:
     rev: v2.37.2
     hooks:
       - id: pyupgrade
-        args: ["--py37-plus"]
+        args: ["--py38-plus"]
   - repo: https://github.com/pre-commit/mirrors-mypy
     rev: v0.971
     hooks:

src/ocrmypdf/_exec/tesseract.py

@@ -244,7 +244,7 @@ def get_deskew(
 
 def tesseract_log_output(stream: bytes) -> None:
     tlog = TesseractLoggerAdapter(
-        log, extra=log.extra if hasattr(log, 'extra') else None
+        log, extra=log.extra if hasattr(log, 'extra') else None  # type: ignore
     )
 
     if not stream:

src/ocrmypdf/_validation.py

@@ -134,7 +134,7 @@ def check_options_preprocessing(options: Namespace) -> None:
             package='unpaper',
             version_checker=unpaper.version,
             need_version='6.1',
-            required_for=['--clean, --clean-final'],
+            required_for="--clean, --clean-final",  # Problem arguments
         )
         try:
             if options.unpaper_args:
@@ -221,7 +221,7 @@ def check_options_metadata(options: Namespace) -> None:
 def check_options_pillow(options: Namespace) -> None:
     PIL.Image.MAX_IMAGE_PIXELS = int(options.max_image_mpixels * 1_000_000)
     if PIL.Image.MAX_IMAGE_PIXELS == 0:
-        PIL.Image.MAX_IMAGE_PIXELS = None
+        PIL.Image.MAX_IMAGE_PIXELS = None  # type: ignore
 
 
 def _check_plugin_invariant_options(options: Namespace) -> None: