[yuri-zubov]

related to rgrove/sanitize#248

This pull request updates the *.gemspec file to optimize the gem package size and structure

$ gem build -o before.tar.gz

$ git switch reduce-gem-size

$ gem build -o after.tar.gz

$ du -sh before.tar.gz after.tar.gz
 24K	before.tar
 20K	after.tar
 

	before	after	saved
size	24K	20K	-4K (⏷ -16.7%)

whitch files was deleted?

data
-├── .github
-│   └── workflows
-│       └── tests.yml
 ├── lib
 │   ├── crass
 │   │   ├── parser.rb
 │   │   ├── scanner.rb
 │   │   ├── token-scanner.rb
 │   │   ├── tokenizer.rb
 │   │   └── version.rb
 │   └── crass.rb
-├── .gitignore
-├── .yardopts
-├── crass.gemspec
-├── Gemfile
 ├── HISTORY.md
 ├── LICENSE
-├── Rakefile
 ├── README.md
-└── SECURITY.md

ps: you can see on rails repo

[rgrove]

Thanks!