Format files with black

- Format all files with black
- Update tox.ini flake8 arguments to be compatible
- Add black to requirements-extra.txt
- Reduce ignored flake8 rules and fix a few violations

core/pe/__init__.py

@@ -1 +1,12 @@
-from . import block, cache, exif, iphoto_plist, matchblock, matchexif, photo, prioritize, result_table, scanner # noqa
+from . import (  # noqa
+    block,
+    cache,
+    exif,
+    iphoto_plist,
+    matchblock,
+    matchexif,
+    photo,
+    prioritize,
+    result_table,
+    scanner,
+)