Run integration test on pr approval. (#155)

.github/workflows/integration.yml

@@ -1,20 +1,22 @@
 name: integration-test
 
 on:
-  push:
-    branches: [ "main" ]
+  pull_request_review:
+    types: [submitted]
+
 
 permissions:
   contents: read
 
 jobs:
   build:
+    if: github.event.review.state == 'approved' && github.event.pull_request.base.ref == 'main'
     runs-on: ubuntu-latest
 
     # Specify python/node versions to test against
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.8", "3.9", "3.10", "3.11"]
         node-version: ["15.x"]
       
     steps: