After upgrading to Xcode 15 make run-ios would fail with
```
❌ /Users/siddarthkumar/code/status-im/PR/status-mobile/ios/Pods/boost/boost/container_hash/hash.hpp:131:33: no template named 'unary_function' in namespace 'std'; did you mean '__unary_function'?
struct hash_base : std::unary_function<T, std::size_t> {};
```
This commit fixes the issue and makes existing codebase compatible with newer Xcode.
reference issue in react-native repo : facebook/react-native#37748
a15c9788fe