Consider domains having current time at "expire_time" attribute expired

Fixes #238

app/models/concerns/domain/expirable.rb

@@ -7,7 +7,7 @@ module Concerns::Domain::Expirable
 
   class_methods do
     def expired
-      where("#{attribute_alias(:expire_time)} < ?", Time.zone.now)
+      where("#{attribute_alias(:expire_time)} <= ?", Time.zone.now)
     end
   end
 
@@ -16,7 +16,7 @@ module Concerns::Domain::Expirable
   end
 
   def expired?
-    expire_time.past?
+    expire_time <= Time.zone.now
   end
 
   def expirable?

spec/models/concerns/domain/expirable_spec.rb

@@ -15,7 +15,7 @@ RSpec.describe Domain, db: false do
     end
 
     it 'returns expired domains' do
-      expect(described_class.expired.ids).to eq([1])
+      expect(described_class.expired.ids).to eq([1, 2])
     end
   end
 
@@ -53,7 +53,7 @@ RSpec.describe Domain, db: false do
     context 'when :expire_time is now' do
       let(:domain) { described_class.new(expire_time: Time.zone.parse('05.07.2010 00:00')) }
 
-      specify { expect(domain).to_not be_expired }
+      specify { expect(domain).to be_expired }
     end
 
     context 'when :expire_time is in the future' do