test(nextjs): Pin next v10 to integration tests (#3692)

To unblock broken master, we pin integration test deps.
Once we've tested more with next v11, we should come back
and update these tests to use a test matrix with varying
next versions.

Co-authored-by: Katie Byers <[email protected]>

Author: AbhiPrasad

packages/nextjs/test/integration/package.json

@@ -7,7 +7,7 @@
   },
   "dependencies": {
     "@sentry/nextjs": "file:../../",
-    "next": "latest",
+    "next": "10.x",
     "react": "^17.0.1",
     "react-dom": "^17.0.1"
   },