Bump buffer from 5.4.2 to 5.4.3 in /mobile/js_files
Bump buffer from 5.4.2 to 5.4.3 in /mobile/js_files

Bumps [buffer](https://github.com/feross/buffer) from 5.4.2 to 5.4.3.
- [Release notes](https://github.com/feross/buffer/releases)
- [Commits](https://github.com/feross/buffer/compare/v5.4.2...v5.4.3)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
Signed-off-by: Jakub Sokołowski <1d3764b91b902f6b45836e2498da81fe35caf6d6@status.im>

status-im/status-react,status-im/status-react,status-im/status-react,status-im/status-react,status-im/status-react,status-im/status-react,status-im/status-react,status-im/status-react