ci: modify tests and publishing workflows

Author: okunator

.github/workflows/publish.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v2
         with:
-          python-version: "3.10"
+          python-version: "3.9"
 
       - name: Install poetry and dependencies
         run: |

.github/workflows/tests.yml

@@ -16,9 +16,8 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        # python-version: [3.7, 3.8, 3.9]
-        python-version: [3.7]
-        os: [ubuntu-latest, macos-latest]
+        python-version: [3.7, 3.10]
+        os: [ubuntu-latest]
     runs-on: ${{ matrix.os }}
     steps:
       - name: Check out repository