/usr/lib/ is in ruby-mime-types 1.25-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/mime/
/usr/lib/ruby/vendor_ruby/mime/types.rb
/usr/lib/ruby/vendor_ruby/mime/types/
/usr/lib/ruby/vendor_ruby/mime/types/text
/usr/lib/ruby/vendor_ruby/mime/types/video.obsolete
/usr/lib/ruby/vendor_ruby/mime/types/video
/usr/lib/ruby/vendor_ruby/mime/types/message.obsolete
/usr/lib/ruby/vendor_ruby/mime/types/text.vms
/usr/lib/ruby/vendor_ruby/mime/types/text.obsolete
/usr/lib/ruby/vendor_ruby/mime/types/application.nonstandard
/usr/lib/ruby/vendor_ruby/mime/types/model
/usr/lib/ruby/vendor_ruby/mime/types/audio.obsolete
/usr/lib/ruby/vendor_ruby/mime/types/image.obsolete
/usr/lib/ruby/vendor_ruby/mime/types/application.obsolete
/usr/lib/ruby/vendor_ruby/mime/types/other.nonstandard
/usr/lib/ruby/vendor_ruby/mime/types/audio.nonstandard
/usr/lib/ruby/vendor_ruby/mime/types/application
/usr/lib/ruby/vendor_ruby/mime/types/multipart
/usr/lib/ruby/vendor_ruby/mime/types/application.mac
/usr/lib/ruby/vendor_ruby/mime/types/multipart.nonstandard
/usr/lib/ruby/vendor_ruby/mime/types/multipart.obsolete
/usr/lib/ruby/vendor_ruby/mime/types/image.nonstandard
/usr/lib/ruby/vendor_ruby/mime/types/image
/usr/lib/ruby/vendor_ruby/mime/types/video.nonstandard
/usr/lib/ruby/vendor_ruby/mime/types/text.nonstandard
/usr/lib/ruby/vendor_ruby/mime/types/message
/usr/lib/ruby/vendor_ruby/mime/types/audio
/usr/lib/ruby/vendor_ruby/mime-types.rb