nokogiri vulnerabilities

[r-kanai]

mimemagic/mimemagic.gemspec

Line 22 in af5a9b1

s.add_dependency('nokogiri', '~> 1')

Version nokogiri before 1.12.5 is vulnerable and violates dependabot. So I ask you to increase the version to 1.12.5.
https://snyk.io/vuln/rubygems:nokogiri