Copyright headers & code syntax

This is minor patch update and it doesn't add new functionality or fixes

Manage bottom inset

• Closed #32

Objective-C support improved

• Closed #31

Minor code style fixes

Nothing special this release 😑

• Minor code style fixes as improve SwiftLint rules.
• Add support of Swift Package

Swift 5.0

1.6.0

Border offset

Add possibility to add offset for bottom line on text field. borderOffset property in TweeBorderedTextField
Relates to #28

Minor fixes

• Fix #21
• Update documentation

Swift 4.2

• #23 Fixed crash 💥
• #25 Swift 4.2 support 🎉

Leaks fixed

• Fix #22
• Update sample project

Fix animation glitch

#19 Good input @loicgriffie 🎉