Bump nokogiri from 1.18.10 to 1.19.0 (#324)

Author: dependabot[bot]

Gemfile.lock

@@ -86,11 +86,11 @@ GEM
     mini_mime (1.1.5)
     multi_test (1.1.0)
     nenv (0.3.0)
-    nokogiri (1.18.10-arm64-darwin)
+    nokogiri (1.19.0-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.18.10-x86_64-darwin)
+    nokogiri (1.19.0-x86_64-darwin)
       racc (~> 1.4)
-    nokogiri (1.18.10-x86_64-linux-gnu)
+    nokogiri (1.19.0-x86_64-linux-gnu)
       racc (~> 1.4)
     notiffany (0.1.3)
       nenv (~> 0.1)