https://git.ruby-lang.org/ruby.git/commit/?id=13baa2b5a5

From 13baa2b5a5eddce9402480d5929261040651f2a0 Mon Sep 17 00:00:00 2001
From: Hiroshi SHIBATA <hsbt@r...>
Date: Fri, 27 Mar 2020 10:01:44 +0900
Subject: [ruby/matrix] Drop to Ruby 2.4 and 2.5

https://github.com/ruby/matrix/commit/3244d82804

diff --git a/lib/matrix/matrix.gemspec b/lib/matrix/matrix.gemspec
index 24e2d59..018963d 100644
--- a/lib/matrix/matrix.gemspec
+++ b/lib/matrix/matrix.gemspec
@@ -17,6 +17,7 @@ Gem::Specification.new do |spec| https://github.com/ruby/ruby/blob/trunk/lib/matrix/matrix.gemspec#L17
   spec.description   = %q{An implementation of Matrix and Vector classes.}
   spec.homepage      = "https://github.com/ruby/matrix"
   spec.license       = "BSD-2-Clause"
+  spec.required_ruby_version = ">= 2.5.0"
 
   spec.files         = [".gitignore", "Gemfile", "LICENSE.txt", "README.md", "Rakefile", "bin/console", "bin/setup", "lib/matrix.rb", "lib/matrix/eigenvalue_decomposition.rb", "lib/matrix/lup_decomposition.rb", "lib/matrix/version.rb", "matrix.gemspec"]
   spec.bindir        = "exe"
-- 
cgit v0.10.2


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