FIX: nil emails are invalid

spec/components/email/email_spec.rb

@@ -5,6 +5,10 @@ describe Email do
 
   describe "is_valid?" do
 
+    it 'treats a nil as invalid' do
+      expect(Email.is_valid?(nil)).to eq(false)
+    end
+
     it 'treats a good email as valid' do
       expect(Email.is_valid?('sam@sam.com')).to eq(true)
     end