[Issue-127] Initial testing - directly pin version to match apt-install python3-matplotlib

Author: jien-cao

pyproject.toml

@@ -36,9 +36,9 @@ keywords = [
 ]
 
 dependencies = [
-    "numpy>=1.17.4",
+    "numpy>=1.17.4,<2", # Cannot use 2.0 due to matplotlib version pinning.
     "scipy",
-    "matplotlib",
+    "matplotlib==3.5.1", # Large user-base has apt-installed python3-matplotlib (ROS2) which is pinned to this version.
     "ansitable",
     "typing_extensions",
     "pre-commit",