Log Message:
devel/ruby-pastel: update to 0.8.0

Update ruby-pastel package to 0.8.0.

## [v0.8.0] - 2020-07-04

### Changed
* Change gemspec to require Ruby 2.0 or higher
* Change Pastel#new to use keyword arguments in place of hash options
* Change to freeze all strings
* Remove equatable dependency

### Fixed
* Fix Pastel#strip to recognise no-number reset by DanielVartanov(@DanielVartanov)
* Fix Pastel#undecorate to correctly assign styles for nested colors