5.0.0 - Function builders, % api, CGFloat, api clean, UIStackViews !

⚠️ A serious bug has been found in this release, please use 5.0.1 instead ⚠️

Bug found that can break your layouts -> #141

• Adds support for CGFloat for all apis
• % constraints can now be used in layout blocks for margins, height & spaces
• sv() is renamed to subviews() for clarity
• subviews() has now its function builder counterpart: subviews{} (no more commas!)
• layout() has now its function builder counterpart: layout {}
• fillVertically(m:) is renamed to fillVertically(padding:)
• fillHorizontally(m:) is renamed to fillHorizontally(padding:)
• fillContainer(x) is renamed to fillContainer(padding: x)
• centerHorizontally(x) is renamed to centerHorizontally(offset: x)
• Double dash -- operator is renamed in hyphen bullet for better compile times. (auto replace)
• Adds UIStackView arrangedSubviews {} function builder