chore: Add pytest to .vscode/settings.json (#315)

.vscode/settings.json

@@ -6,5 +6,10 @@
       "source.fixAll": "explicit",
       "source.organizeImports": "explicit"
     }
-  }
+  },
+  "python.testing.pytestArgs": [
+    "tests"
+  ],
+  "python.testing.unittestEnabled": false,
+  "python.testing.pytestEnabled": true
 }