Swift 4.2 migration
Swift 4.2 migration

VirgilSecurity/virgil-sdk-keys-ios,VirgilSecurity/virgil-sdk-keys-x,VirgilSecurity/virgil-sdk-keys-x,VirgilSecurity/virgil-sdk-keys-ios,VirgilSecurity/virgil-sdk-keys-ios,VirgilSecurity/virgil-sdk-keys-x,VirgilSecurity/virgil-sdk-keys-ios,VirgilSecurity/virgil-sdk-keys-x