matplotlib as an optional (#228)

Co-authored-by: pyansys-ci-bot <[email protected]>

Author: philipjusher

doc/changelog.d/228.fixed.md

@@ -0,0 +1 @@
+matplotlib as an optional

poetry.lock

@@ -43,7 +43,6 @@ websockets = ">=13.0.1"
 async-timeout = { version = ">=4", python = "<3.11" }
 pydantic-settings = "^2.7.1"
 email-validator = "^2.2.0"
-matplotlib = "~3.9"
 tenacity = "^8.2.3"
 [tool.poetry.group.dev.dependencies] # Common packages for test and examples
 plotly = "^5.18.0"
@@ -74,7 +73,7 @@ sphinx-copybutton = "^0.5.1"
 sphinx-design = "^0.6.0"
 pypandoc-binary = "^1.13"
 sphinx-gallery = ">=0.18,<0.20"
-matplotlib = "3.9.4"
+matplotlib = "~3.9"
 pandas = {extras = ["excel"], version = "^2.2.3"}
 
 [tool.poetry.group.tests] # Optional testing dependencies