add ruby v3 supports

.rubocop.yml

@@ -6,7 +6,7 @@ require:
 
 AllCops:
   NewCops: enable
-  TargetRubyVersion: 2.5
+  TargetRubyVersion: 2.7
   Exclude:
     - 'test/**/*'
     - 'vendor/**/*'

Gemfile

@@ -14,6 +14,6 @@ group :test do
   gem 'rack-test'
   gem 'rake'
   gem 'smart_proxy', github: 'theforeman/smart-proxy', branch: 'develop'
-  gem 'test-unit'
+  gem 'test-unit', '~> 3'
   gem 'webmock'
 end

lib/smart_proxy_monitoring_icinga2/monitoring_icinga2_main.rb

@@ -78,7 +78,7 @@ def set_downtime_host(host, author, comment, start_time, end_time, all_services:
     private
 
     def uri_encode_filter(filter)
-      URI.encode(filter)
+      CGI.escape(filter)
     end
 
     def host_attributes(host, data)

smart_proxy_monitoring.gemspec

@@ -15,5 +15,5 @@ Gem::Specification.new do |s|
   s.add_dependency 'json'
   s.add_dependency 'rest-client'
 
-  s.required_ruby_version = '>= 2.5', '< 3'
+  s.required_ruby_version = '>= 2.7', '< 4'
 end

test/monitoring_icinga2/monitoring_icinga2_provider_test.rb

@@ -127,7 +127,7 @@ def test_set_downtime_host_all_services
 
   def test_remove_downtime_host
     icinga_result = '{"results":[{"code":200.0,"status":"Successfully removed all downtimes for object \'xyz.example.com\'."}]}'
-    stub_request(:post, "https://localhost:5665/v1/actions/remove-downtime?author==%22Foreman%22&comment=%22Downtime%20by%20Foreman%22&filter=host.name==%22xyz.example.com%22&type=Host").
+    stub_request(:post, "https://localhost:5665/v1/actions/remove-downtime?filter=host.name==%22xyz.example.com%22%26%26author==%22Foreman%22%26%26comment=%22Downtime%20by%20Foreman%22&type=Host").
       with(:body => "{}").
       to_return(:status => 200, :body => icinga_result)
     @provider.remove_downtime_host('xyz.example.com', 'Foreman', 'Downtime by Foreman')