Remove Python 3.6 and 3.7 from GitHub Actions workflow.

Author: andrii-porokhnavets

.github/workflows/main.yml

@@ -13,25 +13,12 @@ jobs:
           - "windows-latest"
           - "macos-latest"
         python:
-          - "3.6"
-          - "3.7"
           - "3.8"
           - "3.9"
           - "3.10"
           - "3.11"
           - "3.12"
           - "3.13"
-        # Workaround from https://github.com/actions/runner-images/issues/9770
-        exclude:  # Python < v3.8 does not support Apple Silicon ARM64.
-          - python: "3.6"
-            os: macos-latest
-          - python: "3.7"
-            os: macos-latest
-        include:  # So run those legacy versions on Intel CPUs.
-          - python: "3.6"
-            os: macos-13
-          - python: "3.7"
-            os: macos-13
     steps:
       - uses: actions/checkout@v4
       - name: Setup python