Remove Ruby 2.3 and 2.4 from CI

SciRuby / iruby

Official gem repository: Ruby kernel for Jupyter/IPython Notebook

https://github.com/SciRuby/iruby

MIT License

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Remove Ruby 2.3 and 2.4 from CI #332

Closed kojix2 closed 9 months ago

kojix2 commented 9 months ago

ffi requires Ruby version >= 2.5

https://github.com/ffi/ffi/commit/89d23a5c5c2e9b48c72e0f05c04747691d9f8afe

The latest ruby-ffi requires Ruby 2.5 or higher. This has caused tests to fail in SciRuby/iruby. This pull request removes Ruby 2.3 and Ruby 2.4 from CI.