Add nkf as explicit dependency for Ruby head

Author: vnovitskyi

Gemfile.lock

@@ -3,6 +3,7 @@ PATH
   specs:
     ofx (0.4.4)
       bigdecimal
+      nkf
       nokogiri (>= 1.16.3)
 
 GEM
@@ -16,6 +17,7 @@ GEM
     language_server-protocol (3.17.0.5)
     lint_roller (1.1.0)
     mini_portile2 (2.8.5)
+    nkf (0.2.0)
     nokogiri (1.16.3)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)

ofx.gemspec

@@ -27,6 +27,7 @@ Gem::Specification.new do |s|
   s.required_ruby_version = ">= 3.0.0"
 
   s.add_dependency 'bigdecimal'
+  s.add_dependency 'nkf'
   s.add_dependency 'nokogiri', '>= 1.16.3'
   s.add_development_dependency 'byebug', '~> 11.1.3'
   s.add_development_dependency 'rake', '~> 13.2.1'