Log Message:
www/ruby-css-parser: Update to 1.7.1

Update ruby-css-parser to 1.7.1.

Version 1.7.1 (2019-12-01)

    Force UTF-8 encoding; do not strip out UTF-8 chars. #106

Version 1.7.0 (2019-02-11)

    No longer support ruby versions 1.9 2.0 2.1
    Memory allocation improvements