chore: update pre-commit hook mypy

updates:
- github.com/pre-commit/mirrors-mypy: v1.16.0 → v1.20.0

Also enforce consistent indentation in the YAML config file.

Author: DimitriPapadopoulos

.pre-commit-config.yaml

@@ -25,9 +25,9 @@ repos:
     hooks:
     - id: sp-repo-review
 
-  -   repo: https://github.com/pre-commit/mirrors-mypy
-      rev: v1.16.0
-      hooks:
-      -   id: mypy
-          args: [--config-file, pyproject.toml]
-          additional_dependencies: [numpy, pytest, google-crc32c, crc32c, zfpy, 'zarr>=3.1.3']
+  - repo: https://github.com/pre-commit/mirrors-mypy
+    rev: v1.20.0
+    hooks:
+    - id: mypy
+      args: [--config-file, pyproject.toml]
+      additional_dependencies: [numpy, pytest, google-crc32c, crc32c, zfpy, 'zarr>=3.1.3']

tests/test_zarr3.py

@@ -5,9 +5,9 @@
 import pytest
 
 if TYPE_CHECKING:  # pragma: no cover
-    import zarr
+    import zarr.codecs
 else:
-    zarr = pytest.importorskip("zarr", "3.1.3")
+    zarr = pytest.importorskip("zarr.codecs", "3.1.3")
 
 import numcodecs.zarr3 as zarr3