Keep supporting Pyton 3.6 and fix GitHub Packages URL

Author: ilyazub

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
     - name: Checkout repository

.github/workflows/release.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
     steps:
       - uses: actions/checkout@v6
 
@@ -96,7 +96,7 @@ jobs:
         env:
           TWINE_USERNAME: ${{ github.repository_owner }}
           TWINE_PASSWORD: ${{ secrets.GITHUB_TOKEN }}
-        run: twine upload --repository-url https://pypi.pkg.github.com/${{ github.repository_owner }} dist/*
+        run: twine upload --repository-url https://upload.pypi.pkg.github.com/${{ github.repository_owner }}/ dist/*
 
   smoke-test:
     name: Smoke test published package