[PATCH] Update ruby_version requirement to allow ruby 3.0

[Jean Boussier <jean.boussier@shopify.com>]

Ruby just recently bump the master version to 3.0 and this version requirement in unicorn breaks our ruby-head CI.

I don't really see any reason to protect against newer Ruby version.

From d1c43dd70b06543727ac88e3930caa0482558a6b Mon Sep 17 00:00:00 2001
From: Jean Boussier <jean.boussier@gmail.com>
Date: Tue, 1 Sep 2020 14:14:07 +0200
Subject: [PATCH] Update ruby_version requirement to allow ruby 3.0

---
 unicorn.gemspec | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/unicorn.gemspec b/unicorn.gemspec
index cbe855d..9a79055 100644
--- a/unicorn.gemspec
+++ b/unicorn.gemspec
@@ -25,10 +25,7 @@
   s.homepage = 'https://yhbt.net/unicorn/'
   s.test_files = test_files
 
-  # technically we need ">= 1.9.3", too, but avoid the array here since
-  # old rubygems versions (1.8.23.2 at least) do not support multiple
-  # version requirements here.
-  s.required_ruby_version = '< 3.0'
+  s.required_ruby_version = '>= 1.9.3'
 
   # We do not have a hard dependency on rack, it's possible to load
   # things which respond to #call.  HTTP status lines in responses
-- 
2.26.2