baseline CI off Python 3.10

Author: tomkralidis

.github/workflows/debian.yml

@@ -13,7 +13,7 @@ jobs:
       - uses: actions/setup-python@v3
         name: setup Python
         with:
-          python-version: 3.8
+          python-version: '3.10'
       - name: Checkout pywis-pubsub
         uses: actions/checkout@master
       - name: build Debian package 🏗️

.github/workflows/flake8.yml

@@ -11,7 +11,7 @@ jobs:
       - uses: actions/setup-python@v3
         name: setup Python
         with:
-          python-version: 3.8
+          python-version: '3.10'
       - name: Checkout pywis-pubsub
         uses: actions/checkout@master
       - name: Install flake8

.github/workflows/test-publish-subscribe-download.yml

@@ -11,7 +11,7 @@ jobs:
       - uses: actions/setup-python@v3
         name: setup Python
         with:
-          python-version: 3.8
+          python-version: '3.10'
       - name: Install pywis-pubsub
         run: |
           python3 setup.py install