Log Message:
devel/ruby-tty-box: update to 0.7.0

pkgsrc change: update HOMEPAGE to https://ttytoolkit.org/.

## [v0.7.0] - 2020-12-20

### Added
* Add :enable_color configuration to allow control over colouring

### Changed
* Change to ensure non-negative space filler size
* Change to enforce private visibility for the private module methods

### Fixed
* Fix box width calculation to ignore colored text by @LainLayer
* Fix drawing frame around multiline colored content