duckdb.gemspec in duckdb-0.0.7 vs duckdb.gemspec in duckdb-0.0.8

@@ -1,32 +1,35 @@
-lib = File.expand_path("lib", __dir__)
+# frozen_string_literal: true
+
+lib = File.expand_path('lib', __dir__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
-require "duckdb/version"
+require 'duckdb/version'
 
 Gem::Specification.new do |spec|
-  spec.name          = "duckdb"
+  spec.name          = 'duckdb'
   spec.version       = DuckDB::VERSION
-  spec.authors       = ["Masaki Suketa"]
-  spec.email         = ["[e-mail]"]
+  spec.authors       = ['Masaki Suketa']
+  spec.email         = ['[e-mail]']
 
-  spec.summary       = %q{This module is Ruby binding for DuckDB database engine.}
-  spec.description   = "This module is Ruby binding for DuckDB database engine. You must have the DuckDB engine installed to build/use this module."
-  spec.homepage      = "https://github.com/suketa/ruby-duckdb"
-  spec.license       = "MIT"
+  spec.summary       = 'This module is Ruby binding for DuckDB database engine.'
+  spec.description   = 'This module is Ruby binding for DuckDB database engine. You must have the DuckDB engine installed to build/use this module.'
+  spec.homepage      = 'https://github.com/suketa/ruby-duckdb'
+  spec.license       = 'MIT'
 
-  spec.metadata["homepage_uri"] = spec.homepage
-  spec.metadata["source_code_uri"] = "https://github.com/suketa/ruby-duckdb"
-  spec.metadata["changelog_uri"] = "https://github.com/suketa/ruby-duckdb/blob/master/CHANGELOG.md"
+  spec.metadata['homepage_uri'] = spec.homepage
+  spec.metadata['source_code_uri'] = 'https://github.com/suketa/ruby-duckdb'
+  spec.metadata['changelog_uri'] = 'https://github.com/suketa/ruby-duckdb/blob/master/CHANGELOG.md'
 
   # Specify which files should be added to the gem when it is released.
   # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
-  spec.files         = Dir.chdir(File.expand_path('..', __FILE__)) do
+  spec.files = Dir.chdir(File.expand_path('..', __FILE__)) do
     `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
   end
-  spec.require_paths = ["lib"]
-  spec.extensions    = ["ext/duckdb/extconf.rb"]
+  spec.require_paths = ['lib']
+  spec.extensions    = ['ext/duckdb/extconf.rb']
+  spec.required_ruby_version = '>= 2.4.0'
 
-  spec.add_development_dependency "bundler", "~> 2.0"
-  spec.add_development_dependency "rake", "~> 13.0"
-  spec.add_development_dependency "rake-compiler"
-  spec.add_development_dependency "minitest", "~> 5.0"
+  spec.add_development_dependency 'bundler', '~> 2.0'
+  spec.add_development_dependency 'minitest', '~> 5.0'
+  spec.add_development_dependency 'rake', '~> 13.0'
+  spec.add_development_dependency 'rake-compiler'
 end