Chore: Relax development dependencies

Author: amotl

pyproject.toml

@@ -40,14 +40,15 @@ dependencies = [
 [dependency-groups]
 dev = [
     "certifi>=2025.10.5",
-    "coverage>=7.11.0",
-    "mypy>=1.18.2",
-    "pytest>=8.4.2",
+    "mypy<1.19",
+    "poethepoet<1",
+    "pytest<9",
+    "pytest-cov<8",
     "pytz>=2025.2",
-    "ruff>=0.14.2",
+    "ruff<0.15",
     "setuptools>=80.9.0",
-    "stopit>=1.1.2",
-    "verlib2>=0.3.1",
+    "stopit<1.2",
+]
 ]