Remove Python 3.8 to fix build issues

.github/workflows/build.yml

@@ -13,7 +13,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        python-version: ["3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.9", "3.10", "3.11"]
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -96,7 +96,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
         with:
-          python_version: "3.8"
+          python_version: "3.9"
       - uses: jupyterlab/maintainer-tools/.github/actions/install-minimums@v1
       - name: Run the unit tests
         run: |

docs/environment.yml

@@ -5,6 +5,6 @@ channels:
   - free
 dependencies:
   - pip
-  - python=3.8
+  - python=3.9
   - pip:
       - -r doc-requirements.txt

etc/docker/demo-base/README.md

@@ -4,7 +4,7 @@
 - Hadoop 2.7.7
 - Apache Spark 2.4.6
 - Java 1.8 runtime
-- Mini-conda latest (python 3.8) with R packages
+- Mini-conda latest (python 3.9) with R packages
 - Toree 0.4.0-incubating
 - `jovyan` service user, with system users `elyra`, `bob`, and `alice`. The jovyan uid is `1000` to match other jupyter
   images.

pyproject.toml

@@ -15,12 +15,11 @@ classifiers = [
   "Programming Language :: Python",
   "Programming Language :: Python :: 3",
   "Programming Language :: Python :: 3 :: Only",
-  "Programming Language :: Python :: 3.8",
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
 ]
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 dependencies = [
   "docker>=3.5.0",
   "future",