build: exclude matplotlib 3.9.1

There was a problem w/ this release on windows and the builds were pulled from pypi. When installing invoke on windows, pip attempts to build from source, but most (all?) systems won't have the prerequisites for this and installs fail.

This also affects GH actions.

The simple fix is to exclude version 3.9.1 from our deps.

For more information, see matplotlib/matplotlib#28551

Author: psychedelicious

pyproject.toml

@@ -74,7 +74,8 @@ dependencies = [
   "easing-functions",
   "einops",
   "facexlib",
-  "matplotlib",       # needed for plotting of Penner easing functions
+  # Exclude 3.9.1 which has a problem on windows, see https://github.com/matplotlib/matplotlib/issues/28551
+  "matplotlib!=3.9.1",
   "npyscreen",
   "omegaconf",
   "picklescan",