Bump dev requirements

Tom Augspurger · Tom Augspurger · commit c937cb112fd5 · 2021-11-10T13:55:12.000-06:00
diff --git a/requirements-dev.txt b/requirements-dev.txt
@@ -1,5 +1,5 @@
-black==20.8b1
-flake8==3.8.4
+black==21.10b0
+flake8==4.0.1
 ipdb==0.13.7
-mypy==0.790
-setuptools==56.0.0
+mypy==0.910
+setuptools==58.5.3
