Drop 3.7 from ci (#587)

* Drop 3.7 from ci

Currently, CI is broken for 3.7 as github runs its macos images on arm and doesn't provide arm images for 3.7.  As 3.7 is deprecated the best (at least interim) solution would be to drop 3.7 checks entirely.

Author: imcdo

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [Ubuntu, MacOS, Windows]
-        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12']
+        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
     steps:
       - uses: actions/checkout@v4