chore: clean up gemspec #192

Job	Run time
Ruby 3.3 / ActionView 8.1	28s
Ruby 3.3 / ActionView edge	28s
Ruby 3.2 / ActionView 8.0	27s
Ruby 3.3 / ActionView 7.2	27s
Ruby 3.4 / ActionView 8.0	20s
Ruby 3.4 / ActionView 7.2	43s
Ruby ruby-head / ActionView 7.2	11s
Ruby 4.0 / ActionView 7.2	27s
Ruby 3.2 / ActionView 8.1	27s
Ruby ruby-head / ActionView 8.1	27s
Ruby ruby-head / ActionView edge	22s
Ruby 3.2 / ActionView 7.2	27s
Ruby 4.0 / ActionView 8.1	20s
Ruby 4.0 / ActionView 8.0	27s
Ruby 3.3 / ActionView 8.0	27s
Ruby 4.0 / ActionView edge	12s
Ruby ruby-head / ActionView 8.0	17s
Ruby 3.4 / ActionView 8.1	12s
Ruby 3.2 / ActionView edge	17s
Ruby 3.4 / ActionView edge	14s
	7m 40s

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