Dependency: Update Webrick version limitation

[daipom]

Is your feature request related to a problem? Please describe.

Currently, the version of Webrick is limited as follows.

• Add a missing dependency to webrick #3257

• fluentd/fluentd.gemspec

  Line 31 in 34f2c55

  gem.add_runtime_dependency("webrick", [">= 1.4.2", "< 1.8.0"])

Recently, Webrick v1.8 is released:

https://github.com/ruby/webrick/releases

So we need to check if we can update the current version limitation.

As it is, plugins using the latest version of Webrick tries to bundle the Fluentd v1.12.1.

• CI: Support Fluentd after v1.13.3 fluent-plugins-nursery/fluent-plugin-utmpx#6

Describe the solution you'd like

Fix as follows on the feature branch and check the CI.

-  gem.add_runtime_dependency("webrick", [">= 1.4.2", "< 1.8.0"])
+  gem.add_runtime_dependency("webrick", [">= 1.4.2"])

or

-  gem.add_runtime_dependency("webrick", [">= 1.4.2", "< 1.8.0"])
+  gem.add_runtime_dependency("webrick", [">= 1.4.2", "< 1.9.0"])

If there is no problem, we merge it.

Describe alternatives you've considered

All plugins using Webrick also limits the version in the same way as Fluentd.

Additional context

No response

[daipom]

If this looks OK, I will do this.

Fix as follows on the feature branch and check the CI.

[ashie]

-  gem.add_runtime_dependency("webrick", [">= 1.4.2", "< 1.8.0"])
+  gem.add_runtime_dependency("webrick", [">= 1.4.2", "< 1.9.0"])

I think ~> 1.4 or < 2.0 is enough for this.

[daipom]

Thanks for the comment! I will do this.

You mean

gem.add_runtime_dependency("webrick", ["~> 1.4"])

or

gem.add_runtime_dependency("webrick", ["< 2.0"])

?

If so, I'd prefer the latter.

[kenhys]

~> 1.4 bounds to 1.4, 1.5, 1.6 .... 1.9 and so on. thus it is almost equal to < 2.0 practically. (< 2.0 may contain 1.3 or lower)

[daipom]

Sorry, I misunderstood the operator ~>.
I thought ~> 1.4 is almost >= 1.4 and < 1.5, but it was wrong.

https://thoughtbot.com/blog/rubys-pessimistic-operator

Thanks for the advise! I will use ~> 1.4!