don't test poetry self add with python 3.7

Author: jvllmr

.github/workflows/main.yml

@@ -47,7 +47,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        python-version: [3.7, 3.8, 3.9, "3.10", "3.11"]
+        python-version: [3.8, 3.9, "3.10", "3.11"]
         poetry-version: [1.6.1]
         os: [ubuntu-latest, macos-latest]
     steps: