Drop Python 3.6, test 3.12

.github/workflows/build.yml

@@ -76,9 +76,11 @@ jobs:
             jupyterlab-major: '3'
           - python-version: '3.10'
             jupyterlab-major: '4'
+          - python-version: '3.12'
+            jupyterlab-major: '4'
     runs-on: ubuntu-22.04
     # Includes geckdriver and firefox
-    # https://github.com/actions/virtual-environments/blob/main/images/linux/Ubuntu1804-README.md
+    # https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2204-Readme.md
     steps:
       - uses: actions/checkout@v4
 

setup.py

@@ -94,7 +94,7 @@ def get_version():
     long_description_content_type="text/markdown",
     cmdclass=cmdclass,
     install_requires=["jupyter-server"],
-    python_requires=">=3.6",
+    python_requires=">=3.7",
     zip_safe=False,
     include_package_data=True,
     platforms="Linux, Mac OS X, Windows",
@@ -103,9 +103,12 @@ def get_version():
         "License :: OSI Approved :: BSD License",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "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",
         "Framework :: Jupyter",
     ],
 )