apps fail launch on < iOS 13

[LeadAssimilator]

Describe the bug

See BranchMetrics/ios-branch-deep-linking-attribution#1207.

Steps to reproduce

1. Launch app linked with version 9.0.0 on iOS < 13.
2. Watch it crash on launch due to missing symbols.

Expected behavior

Doesn't crash.

SDK Version

9.0.0

Make and Model

iPhone 6S

OS

iOS 12.4

Additional Information/Context

Please yell at the ios branch sdk maintainers to fix this trivial issue that has been open for over a year (or patch it yourself) and push an update so branch can stop crashing on < iOS 13.

[github-actions]

This issue has been automatically marked as stale due to inactivity for 60 days. If this issue is still relevant, please respond with any updates or this issue will be closed in 7 days. If you believe this is a mistake, please comment to let us know. Thank you for your contributions.

[LeadAssimilator]

This issue has been automatically marked as stale due to inactivity for 60 days. If this issue is still relevant, please respond with any updates or this issue will be closed in 7 days. If you believe this is a mistake, please comment to let us know. Thank you for your contributions.

Probably still relevant...