https://git.ruby-lang.org/ruby.git/commit/?id=990025cf60

From 990025cf60eb6586c13f5f055880ac60afbac646 Mon Sep 17 00:00:00 2001
From: Hiroshi SHIBATA <hsbt@r...>
Date: Sat, 30 Nov 2019 15:16:13 +0900
Subject: [ruby/stringio] RbConfig::LIMITS only provide after Ruby 2.5

https://github.com/ruby/stringio/commit/1fed3aacd3

diff --git a/ext/stringio/stringio.gemspec b/ext/stringio/stringio.gemspec
index e49ab70..a16c757 100644
--- a/ext/stringio/stringio.gemspec
+++ b/ext/stringio/stringio.gemspec
@@ -23,7 +23,7 @@ Gem::Specification.new do |s| https://github.com/ruby/ruby/blob/trunk/ext/stringio/stringio.gemspec#L23
   s.files = ["README.md", "ext/stringio/extconf.rb", "ext/stringio/stringio.c"]
   s.homepage = "https://github.com/ruby/stringio"
   s.licenses = ["BSD-2-Clause"]
-  s.required_ruby_version = ">= 2.4"
+  s.required_ruby_version = ">= 2.5"
   s.rubygems_version = "2.6.11"
   s.summary = "Pseudo IO on String"
 
-- 
cgit v0.10.2


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