Relax version constraints in make develop

Makefile

@@ -3,7 +3,7 @@
 develop:
 	python -m pip install pip setuptools wheel --upgrade
 	python -m pip install -e .[examples]
-	python -m pip install -r docs/requirements.txt
+	python -m pip install -r docs/requirements-base.txt
 	python -m pip install sphinx-autobuild pre-commit
 	pre-commit install