Remove python 3.7 and 3.8 from MacOS build.

Latest MacOS on github (14) does not support python 3.7 & 3.8.

Author: termim

.github/workflows/test_macos.yml

@@ -31,7 +31,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-            python-version: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12']
+            python-version: ['3.9', '3.10', '3.11', '3.12']
             os: [macos-latest]
 
     steps: