Bump nokogiri from 1.8.2 to 1.13.4

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.8.2 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@v1.8.2...v1.13.4)

---
updated-dependencies:
- dependency-name: nokogiri
  dependency-type: indirect
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -1,6 +1,6 @@
 GIT
-  remote: git://github.com/middleman-contrib/middleman-deploy.git
-  revision: 243ab38b08896cd5a37d6845a01a5761b934a898
+  remote: https://github.com/middleman-contrib/middleman-deploy.git
+  revision: 4d04b550b4c6888265d83ee9689f41e29dbae535
   specs:
     middleman-deploy (2.0.0.pre.alpha)
       middleman-core (>= 3.2)
@@ -124,23 +124,25 @@ GEM
       parallel
       ruby-progressbar
       unf
-    mini_portile2 (2.3.0)
+    mini_portile2 (2.8.0)
     minitest (5.10.1)
     multi_json (1.12.1)
-    net-sftp (2.1.2)
-      net-ssh (>= 2.6.5)
-    net-ssh (4.1.0)
-    nokogiri (1.8.2)
-      mini_portile2 (~> 2.3.0)
+    net-sftp (3.0.0)
+      net-ssh (>= 5.0.0, < 7.0.0)
+    net-ssh (6.1.0)
+    nokogiri (1.13.4)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
     padrino-helpers (0.13.3.3)
       i18n (~> 0.6, >= 0.6.7)
       padrino-support (= 0.13.3.3)
       tilt (>= 1.4.1, < 3)
     padrino-support (0.13.3.3)
       activesupport (>= 3.1)
     parallel (1.11.1)
-    ptools (1.3.3)
+    ptools (1.4.2)
     public_suffix (2.0.5)
+    racc (1.6.0)
     rack (1.6.5)
     rack-contrib (1.4.0)
       git-version-bump (~> 0.15)