Bump nokogiri from 1.10.3 to 1.10.4 in /6.secrets/cool-app

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.10.3 to 1.10.4.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sparklemotion/nokogiri/compare/v1.10.3...v1.10.4)
Signed-off-by: dependabot[bot] <support@github.com>

6.secrets/cool-app/Gemfile.lock

@@ -112,7 +112,7 @@ GEM
     minitest (5.11.3)
     msgpack (1.2.10)
     nio4r (2.3.1)
-    nokogiri (1.10.3)
+    nokogiri (1.10.4)
       mini_portile2 (~> 2.4.0)
     popper_js (1.14.5)
     public_suffix (3.1.0)