Update nokogiri requirement version to >= 1.13.1, < 1.16.0

Gemfile.lock

@@ -2,32 +2,32 @@ PATH
   remote: .
   specs:
     ofx (0.3.3)
-      nokogiri (~> 1.13.1)
+      nokogiri (>= 1.13.1, < 1.16.0)
 
 GEM
   remote: https://rubygems.org/
   specs:
     byebug (11.1.3)
-    diff-lcs (1.5.0)
-    mini_portile2 (2.8.0)
-    nokogiri (1.13.8)
-      mini_portile2 (~> 2.8.0)
+    diff-lcs (1.5.1)
+    mini_portile2 (2.8.6)
+    nokogiri (1.15.6)
+      mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
-    racc (1.6.0)
+    racc (1.7.3)
     rake (13.0.6)
-    rspec (3.11.0)
-      rspec-core (~> 3.11.0)
-      rspec-expectations (~> 3.11.0)
-      rspec-mocks (~> 3.11.0)
-    rspec-core (3.11.0)
-      rspec-support (~> 3.11.0)
-    rspec-expectations (3.11.0)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.0)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.11.0)
-    rspec-mocks (3.11.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.11.0)
-    rspec-support (3.11.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.1)
 
 PLATFORMS
   ruby

ofx.gemspec

@@ -24,7 +24,7 @@ Gem::Specification.new do |s|
   s.require_paths = ['lib']
   s.licenses      = ['MIT']
 
-  s.add_dependency 'nokogiri', '~> 1.13.1'
+  s.add_dependency 'nokogiri', '>= 1.13.1', '< 1.16.0'
   s.add_development_dependency 'byebug', '~> 11.1.3'
   s.add_development_dependency 'rake', '~> 13.0.6'
   s.add_development_dependency 'rspec', '~> 3.10'