* gemspec: require mfa

Author: palkan

graphql-anycable.gemspec

@@ -17,6 +17,10 @@ Gem::Specification.new do |spec|
   spec.homepage = "https://github.com/Envek/graphql-anycable"
   spec.license = "MIT"
 
+  spec.metadata = {
+    "rubygems_mfa_required" => "true"
+  }
+
   # Specify which files should be added to the gem when it is released.
   # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
   spec.files = Dir.chdir(File.expand_path(__dir__)) do