Add dev deps to pyproject.toml

Author: oschwald

pyproject.toml

@@ -34,9 +34,17 @@ classifiers = [
     "Topic :: Internet :: Proxy Servers",
 ]
 
-[project.optional-dependencies]
-test = [
+[dependency-groups]
+dev = [
+    "pytest==8.3.5",
     "pytest-httpserver>=1.0.10",
+    "types-requests>=2.32.0.20250328",
+]
+lint = [
+    "black==25.1.0",
+    "mypy==1.15.0",
+    "pylint==3.3.6",
+    "ruff==0.11.6",
 ]
 
 [tool.ruff.lint]