Bump nokogiri from 1.12.5 to 1.13.4

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.12.5 to 1.13.4.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/v1.13.4/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.12.5...v1.13.4)

---
updated-dependencies:
- dependency-name: nokogiri
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -126,14 +126,14 @@ GEM
       nokogiri (~> 1)
       rake
     mini_mime (1.1.1)
-    mini_portile2 (2.6.1)
+    mini_portile2 (2.8.0)
     minitest (5.14.4)
     multi_json (1.15.0)
     mustache (1.1.1)
     narray (0.6.0.4)
     nio4r (2.5.8)
-    nokogiri (1.12.5)
-      mini_portile2 (~> 2.6.1)
+    nokogiri (1.13.4)
+      mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     optimist (3.0.1)
     passenger (6.0.11)
@@ -153,7 +153,7 @@ GEM
     public_suffix (4.0.6)
     rabl (0.14.5)
       activesupport (>= 2.3.14)
-    racc (1.5.2)
+    racc (1.6.0)
     rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)