Update version number to 1.3.20

Update version + update changelog

Merge pull request layoutBox#152 from layoutBox/dependabot/bundler/ru…

…byzip-1.3.0

Bump rubyzip from 1.2.3 to 1.3.0

Release 1.3.17

Update version to 1.3.16

Bump version to 1.3.15

Update for release 1.3.14

Update version to 1.3.12

Merge pull request layoutBox#107 from layoutBox/fix_padding

Fix top padding in method padding(_ top: CGFloat, _ left: CGFloat, _ …

Update version to 1.3.10