Merge pull request #8 from libtcod/dependabot/bundler/nokogiri-1.13.9

Bump nokogiri from 1.13.6 to 1.13.9

Author: HexDecimal

Gemfile.lock

@@ -211,14 +211,14 @@ GEM
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
+    mini_portile2 (2.8.0)
     minima (2.5.1)
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
     minitest (5.16.2)
-    nokogiri (1.13.6-x64-mingw32)
-      racc (~> 1.4)
-    nokogiri (1.13.6-x86_64-linux)
+    nokogiri (1.13.9)
+      mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     octokit (4.25.1)
       faraday (>= 1, < 3)
@@ -257,7 +257,6 @@ GEM
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.8.2)
-    unf_ext (0.0.8.2-x64-mingw32)
     unicode-display_width (1.8.0)
     wdm (0.1.1)
     zeitwerk (2.6.0)