ci: drop 3.7

Author: mikedh

.github/workflows/release.yml

@@ -27,7 +27,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.8", "3.9", "3.10", "3.11"]
         os: [ubuntu-latest, macos-13, windows-latest]
         exclude:
             # windows runners have gotten flaky