README.md in iz-0.1.0 vs README.md in iz-0.2.0

@@ -31,9 +31,12 @@
 Iz.credit_card?('4242424242424242') # => true
 
 Iz.mac?('ababababab') # => true
 Iz.mac?(-1) # => false
 
+Iz.email?('[e-mail]') # => true
+Iz.email?(nil) # => false
+
 Iz.binary?('010101') # => true
 Iz.binary?('foo') # => false
 
 Iz.hexadecimal?(0x34) # => true
 Iz.hexadecimal?('abcdef123') # => true