Add python 3.13, drop 3.8

Author: ianthomas23

.github/workflows/main.yml

@@ -21,7 +21,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
     - name: Checkout

pyproject.toml

@@ -20,11 +20,11 @@ classifiers = [
     "License :: OSI Approved :: BSD License",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Topic :: Multimedia :: Graphics",
 ]
 dependencies = ["traitlets"]
@@ -37,7 +37,7 @@ keywords = [
 ]
 license = {file = "LICENSE"}
 readme = "README.md"
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 
 [project.entry-points."matplotlib.backend"]
 inline = "matplotlib_inline.backend_inline"