Bump nokogiri from 1.10.4 to 1.10.8 (#84)

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.10.4 to 1.10.8.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/master/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.10.4...v1.10.8)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -75,7 +75,7 @@ GEM
     net-http-persistent (3.1.0)
       connection_pool (~> 2.2)
     netrc (0.11.0)
-    nokogiri (1.10.4)
+    nokogiri (1.10.8)
       mini_portile2 (~> 2.4.0)
     ntlm-http (0.1.1)
     oauth2 (1.4.1)