Update gem specification

Gemfile

@@ -1,3 +1,5 @@
 source 'https://rubygems.org'
 
 gemspec
+
+gem 'theforeman-rubocop', '~> 0.1.1'

foreman_cve_scanner.gemspec

@@ -1,25 +1,23 @@
 require File.expand_path('lib/foreman_cve_scanner/version', __dir__)
+require 'date'
 
 Gem::Specification.new do |s|
   s.name        = 'foreman_cve_scanner'
   s.version     = ForemanCveScanner::VERSION
+  s.date        = Date.today.to_s
   s.metadata    = { 'is_foreman_plugin' => 'true' }
   s.license     = 'GPL-3.0'
   s.authors     = ['Bernhard Suttner']
   s.email       = ['[email protected]']
-  s.homepage    = 'https://atix.de'
+  s.homepage    = 'https://github.com/ATIX-AG/foreman_cve_scanner'
   s.summary     = 'Run CVE scan on host and collect report'
   # also update locale/gemspec.rb
   s.description     = 'Run CVE scan on host and collect report'
 
   s.files = Dir['{app,config,db,lib,locale,webpack}/**/*'] + ['LICENSE', 'Rakefile', 'README.md']
   s.test_files = Dir['test/**/*'] + Dir['webpack/**/__tests__/*.js']
 
-  s.required_ruby_version = '>= 2.7'
+  s.required_ruby_version = '>= 2.7', < 4
 
   s.add_development_dependency 'rdoc'
-  s.add_development_dependency 'rubocop'
-  s.add_development_dependency 'rubocop-minitest'
-  s.add_development_dependency 'rubocop-performance'
-  s.add_development_dependency 'rubocop-rails'
 end