Log Message:
textproc/ruby-csv: update to 3.1.9

3.1.9 - 2020-11-23

Fixes
* Fixed a compatibility bug that the line to be processed by skip_lines:
  has a row separator. [GitHub#194][Reported by Josef Šimánek]

Thanks
* Josef Šimánek

3.1.8 - 2020-11-18

Improvements
* Improved documentation. [Patch by Burdette Lamar]

Thanks
* Burdette Lamar