bump dependencies (#48)

* bump dependencies

* update actions/cache

Author: ldruschk

.github/workflows/pythonapp.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
     - uses: actions/checkout@v2
@@ -35,7 +35,7 @@ jobs:
         python -m poetry config virtualenvs.in-project true
 
     - name: Cache the virtualenv
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       with:
         path: ./.venv
         key: ${{ runner.os }}-venv-${{ hashFiles('**/poetry.lock') }}