Update dev dependencies: ruff, pyproject-fmt, coverage minimum

- ruff pre-commit hook: v0.15.11 → v0.15.12 (patch)
- pyproject-fmt pre-commit hook: v2.21.1 → v2.21.2 (patch)
- coverage minimum version: >=6.5 → >=7.0 (current release is 7.13.5)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: nickmoreton

.pre-commit-config.yaml

@@ -15,7 +15,7 @@ repos:
           - id: check-yaml
           - id: debug-statements
     - repo: https://github.com/tox-dev/pyproject-fmt
-      rev: "v2.21.1"
+      rev: "v2.21.2"
       hooks:
           - id: pyproject-fmt
             args: ["--max-supported-python=3.14"]
@@ -25,7 +25,7 @@ repos:
           - id: django-upgrade
             args: [--target-version, "5.2"]
     - repo: https://github.com/astral-sh/ruff-pre-commit
-      rev: "v0.15.11"
+      rev: "v0.15.12"
       hooks:
           - id: ruff-check
             args: [--fix, --exit-non-zero-on-fix]

pyproject.toml

@@ -36,7 +36,7 @@ dependencies = [
 ]
 optional-dependencies.docs = []
 optional-dependencies.testing = [
-  "coverage>=6.5",
+  "coverage>=7.0",
   "pre-commit>=4",
   "tox>=4.18.1",
 ]