improve: Updated gemspec

Gemfile

@@ -4,7 +4,9 @@ source 'http://rubygems.org'
 
 gemspec
 
-group :development, :test do
+group :development do
+  gem 'rubocop'
+
   gem 'delayed_job', '~> 3.0.0'
   gem 'delayed_job_active_record'
   gem 'rails', '~> 3.0'
@@ -13,5 +15,6 @@ group :development, :test do
   gem 'sucker_punch', '~> 2.1.2'
 end
 
-gem 'rspec', group: :test
-gem 'rubocop', group: :development
+group :test do
+  gem 'rspec'
+end

vero.gemspec

@@ -3,26 +3,24 @@
 $LOAD_PATH.push('lib')
 require 'vero/version'
 
-Gem::Specification.new do |s|
-  s.name     = 'vero'
-  s.version  = Vero::VERSION.dup
-  s.date     = Time.now.strftime('%Y-%m-%d')
-  s.summary  = 'Ruby gem for Vero'
-  s.email    = 'support@getvero.com'
-  s.homepage = 'http://www.getvero.com/'
-  s.authors  = ['James Lamont']
+Gem::Specification.new do |spec|
+  spec.name     = 'vero'
+  spec.version  = Vero::VERSION.dup
+  spec.date     = Time.now.strftime('%Y-%m-%d')
+  spec.authors  = ['James Lamont']
+  spec.email    = ['support@getvero.com']
 
-  s.add_runtime_dependency 'json'
-  s.add_runtime_dependency 'rest-client'
+  spec.summary  = 'Ruby gem for Vero'
+  spec.description = 'Ruby gem for Vero'
+  spec.homepage = 'http://www.getvero.com/'
 
-  s.files         = Dir['**/*']
-  s.test_files    = Dir['test/**/*'] + Dir['spec/**/*']
-  s.executables   = Dir['bin/*'].map { |f| File.basename(f) }
-  s.require_paths = ['lib']
+  spec.files         = Dir['**/*']
+  spec.test_files    = Dir['test/**/*'] + Dir['spec/**/*']
+  spec.executables   = Dir['bin/*'].map { |f| File.basename(f) }
+  spec.require_paths = ['lib']
 
-  ## Make sure you can build the gem on older versions of RubyGems too:
-  s.rubygems_version = '1.8.23'
-  s.required_ruby_version = '>= 2.4.0'
-  s.required_rubygems_version = Gem::Requirement.new('>= 0') if s.respond_to? :required_rubygems_version=
-  s.specification_version = 3 if s.respond_to? :specification_version
+  spec.required_ruby_version = '>= 2.6.6'
+
+  spec.add_runtime_dependency 'json'
+  spec.add_runtime_dependency 'rest-client'
 end