move dev dependencies to pyproject.toml

Makefile.pyproject

@@ -40,6 +40,7 @@
 YEAR=`date +%Y`
 MONTH=`date +%m`
 
+# Python-specific targets
 
 .PHONY: clean_py
 clean_py: clean-venv
@@ -116,3 +117,10 @@ release: typecheck_py lint_py test version_py
 
 
 include Makefile.venv
+
+## Patch venv to install from pyproject.toml
+
+venv: | $(VENV)/$(MARKER)-dev
+$(VENV)/$(MARKER)-dev: $(VENV)/$(MARKER)
+	$(VENV)/pip install -e .[dev]
+	touch $@

pyproject.toml

@@ -20,21 +20,23 @@ classifiers = [
     "License :: OSI Approved :: MIT License"
 ]
 dependencies = [
+    "importlib_resources",
+    "Jinja2 >= 3.1.2",
+    "markdown >= 3.4.4",
+    "MarkupSafe >= 2.1.3",
+    "netaddr >= 0.9.0",
     "thor >= 0.9.6",
-    "markdown >= 2.6.5",
-    "netaddr >= 0.7.19",
-    "Jinja2 >= 2.11.1",
-    "typing-extensions >= 4.3.0",
-    "MarkupSafe",
-    "importlib_resources"
+    "typing-extensions >= 4.8.0",
 ]
 
 [project.urls]
 homepage = "https://redbot.org/project/"
 
 [project.optional-dependencies]
 systemd = ["cysystemd"]
-dev = ["mypy", "playwright", "black", "pytest", "pytest-md", "validate-pyproject"]
+dev = ["mypy", "black", "pylint", "pytest", "pytest-md", "validate-pyproject", "build",
+       "playwright", "types-Markdown"]
+
 
 [project.scripts]
 redbot = "redbot.cli:main"