Require Ruby 2.7+ in gemspec

vcr.gemspec

@@ -1,45 +1,43 @@
 #!/usr/bin/env ruby
-# coding: utf-8
-
-lib = File.expand_path("../lib", __FILE__)
+lib = File.expand_path('lib', __dir__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
-require "vcr/version"
+require 'vcr/version'
 
 Gem::Specification.new do |spec|
-  spec.name          = "vcr"
+  spec.name          = 'vcr'
   spec.version       = VCR.version
-  spec.authors       = ["Myron Marston", "Kurtis Rainbolt-Greene", "Olle Jonsson"]
-  spec.email         = ["kurtis@rainbolt-greene.online"]
-  spec.summary       = %q{Record your test suite's HTTP interactions and replay them during future test runs for fast, deterministic, accurate tests.}
+  spec.authors       = ['Myron Marston', 'Kurtis Rainbolt-Greene', 'Olle Jonsson']
+  spec.email         = ['kurtis@rainbolt-greene.online']
+  spec.summary       = "Record your test suite's HTTP interactions and replay them during future test runs for fast, deterministic, accurate tests."
   spec.description   = spec.summary
-  spec.homepage      = "https://benoittgt.github.io/vcr"
-  spec.licenses       = ["Hippocratic-2.1", "MIT"]
+  spec.homepage      = 'https://benoittgt.github.io/vcr'
+  spec.licenses = ['Hippocratic-2.1', 'MIT']
 
-  spec.files         = Dir[File.join("lib", "**", "*")]
-  spec.executables   = Dir[File.join("bin", "**", "*")].map! { |f| f.gsub(/bin\//, "") }
-  spec.require_paths = ["lib"]
+  spec.files         = Dir[File.join('lib', '**', '*')]
+  spec.executables   = Dir[File.join('bin', '**', '*')].map! { |f| f.gsub(%r{bin/}, '') }
+  spec.require_paths = ['lib']
 
-  spec.required_ruby_version = ">= 2.6"
+  spec.required_ruby_version = '>= 2.7'
 
-  spec.add_development_dependency "bundler", "~> 2.0"
-  spec.add_development_dependency "rspec", "~> 3.0"
-  spec.add_development_dependency "test-unit", "~> 3.4.4"
-  spec.add_development_dependency "rake", ">= 12.3.3"
-  spec.add_development_dependency "pry", "~> 0.9"
-  spec.add_development_dependency "pry-doc", "~> 0.6"
-  spec.add_development_dependency "codeclimate-test-reporter", "~> 0.4"
-  spec.add_development_dependency "yard"
-  spec.add_development_dependency "rack"
-  spec.add_development_dependency "webmock"
-  spec.add_development_dependency "hashdiff", ">= 1.0.0.beta1", "< 2.0.0"
-  spec.add_development_dependency "cucumber", "~> 7.0"
-  spec.add_development_dependency "aruba", "~> 0.14.14"
-  spec.add_development_dependency "faraday", ">= 0.11.0", "< 2.0.0"
-  spec.add_development_dependency "httpclient"
-  spec.add_development_dependency "excon", ">= 0.62.0"
-  spec.add_development_dependency "timecop"
-  spec.add_development_dependency "json"
-  spec.add_development_dependency "relish"
-  spec.add_development_dependency "mime-types"
-  spec.add_development_dependency "sinatra"
+  spec.add_development_dependency 'aruba', '~> 0.14.14'
+  spec.add_development_dependency 'bundler', '~> 2.0'
+  spec.add_development_dependency 'codeclimate-test-reporter', '~> 0.4'
+  spec.add_development_dependency 'cucumber', '~> 7.0'
+  spec.add_development_dependency 'excon', '>= 0.62.0'
+  spec.add_development_dependency 'faraday', '>= 0.11.0', '< 2.0.0'
+  spec.add_development_dependency 'hashdiff', '>= 1.0.0.beta1', '< 2.0.0'
+  spec.add_development_dependency 'httpclient'
+  spec.add_development_dependency 'json'
+  spec.add_development_dependency 'mime-types'
+  spec.add_development_dependency 'pry', '~> 0.9'
+  spec.add_development_dependency 'pry-doc', '~> 0.6'
+  spec.add_development_dependency 'rack'
+  spec.add_development_dependency 'rake', '>= 12.3.3'
+  spec.add_development_dependency 'relish'
+  spec.add_development_dependency 'rspec', '~> 3.0'
+  spec.add_development_dependency 'sinatra'
+  spec.add_development_dependency 'test-unit', '~> 3.4.4'
+  spec.add_development_dependency 'timecop'
+  spec.add_development_dependency 'webmock'
+  spec.add_development_dependency 'yard'
 end