Minor readme fix

Author: k4m4

package-lock.json

@@ -21,7 +21,7 @@ ethereumRegex().test('nodejsrocks 0x281055afc982d96fab65b3a49cac8b878184cb16');
 ethereumRegex({exact: true}).test('nodejsrocks 0x281055afc982d96fab65b3a49cac8b878184cb16 foo');
 //=> false
 
-ethereumRegex.v6({exact: true}).test('0x281055afc982d96fab65b3a49cac8b878184cb16');
+ethereumRegex({exact: true}).test('0x281055afc982d96fab65b3a49cac8b878184cb16');
 //=> true
 
 'nodejsrocks 0x6f46cf5569aefa1acc1009290c8e043747172d89 unicorn 0x90e63c3d53e0ea496845b7a03ec7548b70014a91 rainbow'.match(ethereumRegex());