Valora 1.18.3

Summary

Commits included

This release is a patch on top of v1.18.0 (6e0f61e), with some additional commits. See release branch: https://github.com/celo-org/wallet/tree/release/wallet/1.18.3

Bug fixes

• Use Valora terms of service link (2eb1b93)
• Update Valora privacy policies (86c84c6)
• Contact Privacy tweak (ead0704)
• Remove ImportContact screen (8ea5a70)
• Update yarn.lock (31ac304)