⬆️ Drop support for Python 3.7, require Python 3.8 or above (#10442)

* 📝 Update docs, require Python 3.8+, drop 3.7

* 🔧 Update pyproject.toml, drop support for Python 3.7, require Python 3.8+

* 👷 Update CI GitHub Actions, drop support for Python 3.7, require 3.8+

* 📝 Update docs' references to Python 3.6 and 3.7, use Python 3.8

.github/workflows/publish.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: "3.7"
+          python-version: "3.10"
           # Issue ref: https://github.com/actions/setup-python/issues/436
           # cache: "pip"
           cache-dependency-path: pyproject.toml

.github/workflows/test.yml

@@ -42,7 +42,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.8", "3.9", "3.10", "3.11"]
         pydantic-version: ["pydantic-v1", "pydantic-v2"]
       fail-fast: false
     steps: