Xcode 10 & Swift 4.2- Prerelease

• Migrates codebase to Swift 4.2
• Pre-built framework built with Xcode10
• New Bulgarian wordings 🇧🇬 courtesy to @t0a0
• Russian wording amends (thanks @t0a0)!

⚠️ The pod installation is not working at the moment but we're on it :)