test: Use new Singer SDK testing framework

.github/workflows/test.yml

@@ -2,6 +2,10 @@ name: Test tap-stackexchange
 
 on: [push]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   tests:
     runs-on: ubuntu-latest
@@ -36,5 +40,7 @@ jobs:
         tox --version
 
     - name: Run lint command from tox.ini
+      env:
+        TAP_STACKEXCHANGE_KEY: ${{ secrets.TAP_STACKEXCHANGE_KEY }}
       run: |
         tox -e pytest

.vscode/settings.json

@@ -1,8 +1,7 @@
 {
-    "python.formatting.provider": "black",
-    "cSpell.words": [
-        "jsonl",
-        "stackexchange",
-        "stackoverflow"
-    ]
+  "python.formatting.provider": "black",
+  "cSpell.words": ["jsonl", "stackexchange", "stackoverflow"],
+  "python.testing.pytestArgs": ["tests"],
+  "python.testing.unittestEnabled": false,
+  "python.testing.pytestEnabled": true
 }