Auto merge of #170 - olleolleolle:feature/update-sequel-to-5-0.0, r=i…

…ndirect

gem: sequel v5.0.0

This PR tries to update Sequel to the next major version.

[Changelog](https://github.com/jeremyevans/sequel/blob/master/CHANGELOG)

(I had a weird failure on my local Ruby test suite, seemed unrelated, will test the matrix, too. **Update**: no error there.)

gemstash.gemspec

@@ -35,7 +35,7 @@ you push your own private gems as well."
   spec.add_runtime_dependency "lru_redux", "~> 1.1"
   spec.add_runtime_dependency "puma", "~> 3.10"
   spec.add_runtime_dependency "server_health_check-rack", "~> 0.1"
-  spec.add_runtime_dependency "sequel", "~> 4.26"
+  spec.add_runtime_dependency "sequel", "~> 5.0"
   spec.add_runtime_dependency "sinatra", "~> 1.4"
   spec.add_runtime_dependency "thor", "~> 0.19"