CI

Remove duplicate datatype in writer lang option #39

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Run time

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Job	Run time
Ruby 3.0 Gemfile	29s
Ruby 3.0 Gemfile-pure	25s
Ruby 3.1 Gemfile	33s
Ruby 3.1 Gemfile-pure	29s
Ruby 3.2 Gemfile	30s
Ruby 3.2 Gemfile-pure	27s
Ruby 3.3 Gemfile	28s
Ruby 3.3 Gemfile-pure	28s
Ruby ruby-head Gemfile	1m 17s
Ruby ruby-head Gemfile-pure	1m 16s
Ruby jruby Gemfile	1m 8s
Ruby jruby Gemfile-pure	1m 13s
	8m 43s