Log Message:
devel/ruby-red-datasets: update to 0.1.5

pkgsrc change: drop ruby26 support.

0.1.5 (2022-09-22)

Improvements

* Datasets::PMJTDatasetList: Added. [GitHub#107][Patch by okadak]
* Datasets::AozoraBunko: Added. [GitHub#108][Patch by Masa]
* Added how to develop to README [GitHub#117][Patch by abcdefg-1234567]
* Datasets::FuelEconomy: Added. [GitHub#114][Patch by Benson Muite]
* Datasets::Geolonia: Added. [GitHub#118][Patch by abcdefg-1234567]
* Datasets::Diamonds: Added. [GitHub#110][Patch by Benson Muite]
* Datasets::ITACorpus: Added. [GitHub#119][Patch by abcdefg-1234567]
* Datasets::KuzushijiMNIST: Added. [GitHub#125][Patch by abcdefg-1234567]
* Updated list of datasets in README. [GitHub#129][Patch by Benson Muite]
* Datasets::CaliforniaHousing: Added. [GitHub#123][Patch by Benson Muite]
* Added support for Ruby 3.1. [GitHub#130][Patch by Benson Muite]
* Datasets::AFINN: Added. [GitHub#120][Patch by Benson Muite]
* Datasets::LivedoorNews: Added. [GitHub#127][Patch by abcdefg-1234567]
* Datasets::SeabornDataList: Added. [GitHub#134][Patch by Hirokazu SUZUKI]
* Datasets::WikipediaKyotoJapaneseEnglish: Added. [GitHub#135][Patch by
  abcdefg-1234567]
* Renamed Rdatasets to Rdataset. [GitHub#148][Patch by Hirokazu SUZUKI]
* Removed support for Ruby 2.6.
* Add missing license information.
* Datasets::QuoraDuplicateQuestionPair: Added. [GitHub#149][Patch by
  otegami]

Fixes

* Fixed key from nil to :index in Datasets::SeabornData. [GitHub#133][Patch
  by Hirokazu SUZUKI]
* Fixed Datasets::Rdatasets#each to change "NA" to nil. [GitHub#139][Patch
  by Hirokazu SUZUKI]
* Fix Datasets::Rdatasets#each with mixed data of numeric and
  string. [GitHub#140][Patch by Hirokazu SUZUKI]

Thanks

* okadak
* Masa
* Benson Muite
* abcdefg-1234567
* Hirokazu SUZUKI
* Sutou Kouhei
* otegami