Core: Bump minimum python 3 version for pypi build

Author: ikelos

.github/workflows/build-pypi.yml

@@ -15,10 +15,10 @@ on:
 jobs:
 
   build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     strategy:
       matrix:
-        python-version: ["3.6"]
+        python-version: ["3.7"]
     steps:
     - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}