Merge pull request #4 from nobu/update-ruby_version

Update the required ruby version

Author: hsbt

.github/workflows/test.yml

@@ -7,7 +7,7 @@ jobs:
     name: build (${{ matrix.ruby }} / ${{ matrix.os }})
     strategy:
       matrix:
-        ruby: [ '3.0', 2.7, 2.6, 2.5, 2.4, head ]
+        ruby: [ head, '3.0', '2.7', '2.6' ]
         os: [ ubuntu-latest, macos-latest ]
     runs-on: ${{ matrix.os }}
     steps:

net-protocol.gemspec

@@ -16,7 +16,7 @@ Gem::Specification.new do |spec|
   spec.summary       = %q{The abstruct interface for net-* client.}
   spec.description   = %q{The abstruct interface for net-* client.}
   spec.homepage      = "https://github.com/ruby/net-protocol"
-  spec.required_ruby_version = Gem::Requirement.new(">= 2.3.0")
+  spec.required_ruby_version = Gem::Requirement.new(">= 2.6.0")
   spec.licenses      = ["Ruby", "BSD-2-Clause"]
 
   spec.metadata["homepage_uri"] = spec.homepage