test(nextjs): Pin next v10 to integration tests (#3692)
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 <e2654d977b8a353f21b4e3ec80eb957784a9e5d4@sentry.io>
getsentry/raven-js,getsentry/raven-js,getsentry/raven-js,getsentry/raven-js