Upgrade nokogiri to 1.19.3 to fix Dependabot security alerts (#68)

This upgrade addresses CVE-2025-32414 and CVE-2025-32415 by updating nokogiri to version 1.19.3 which uses libxml2 v2.13.8.

Author: technicalpickles

Gemfile.lock

@@ -142,26 +142,22 @@ GEM
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
     method_source (1.1.0)
-    mini_portile2 (2.8.8)
     minitest (5.25.5)
     nap (1.1.0)
     net-http (0.6.0)
       uri
     netrc (0.11.0)
-    nokogiri (1.18.5)
-      mini_portile2 (~> 2.8.2)
+    nokogiri (1.19.3-aarch64-linux-gnu)
       racc (~> 1.4)
-    nokogiri (1.18.5-aarch64-linux-gnu)
+    nokogiri (1.19.3-aarch64-linux-musl)
       racc (~> 1.4)
-    nokogiri (1.18.5-aarch64-linux-musl)
+    nokogiri (1.19.3-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.18.5-arm64-darwin)
+    nokogiri (1.19.3-x86_64-darwin)
       racc (~> 1.4)
-    nokogiri (1.18.5-x86_64-darwin)
+    nokogiri (1.19.3-x86_64-linux-gnu)
       racc (~> 1.4)
-    nokogiri (1.18.5-x86_64-linux-gnu)
-      racc (~> 1.4)
-    nokogiri (1.18.5-x86_64-linux-musl)
+    nokogiri (1.19.3-x86_64-linux-musl)
       racc (~> 1.4)
     octokit (9.2.0)
       faraday (>= 1, < 3)
@@ -334,7 +330,6 @@ PLATFORMS
   aarch64-linux-gnu
   aarch64-linux-musl
   arm64-darwin
-  ruby
   universal-darwin
   x86_64-darwin
   x86_64-linux