make sure versions are interpreted as strings

3.10 was being interpreted as 3.1 with a trailing 0

.github/workflows/lint_and_test.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.8, 3.9, 3.10, 3.11, 3.12, pypy3]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "pypy3"]
         image_size: ['true', 'false']
     steps:
       - uses: actions/checkout@v2