Bump nokogiri from 1.10.8 to 1.10.9

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.10.8 to 1.10.9.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/v1.10.9/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.10.8...v1.10.9)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

Gemfile.lock

@@ -219,7 +219,7 @@ GEM
       connection_pool (~> 2.2)
     net-http-pipeline (1.0.1)
     nio4r (2.5.2)
-    nokogiri (1.10.8)
+    nokogiri (1.10.9)
       mini_portile2 (~> 2.4.0)
     os (1.0.1)
     pg (1.2.2)