Fixes error with international URLs that have more than 2 hyphens (#184)

* Adds support for emojis and more IDNA URLs

* Adds setup_requires parameter

* Validates URLs with IPs ending in .0 or .255

* Fixed flake8 errors

* Revert "Adds setup_requires parameter"

This reverts commit 42ea2fd.

* Fixes international domains with more than 2 hyphens

Co-authored-by: Matthew Wilson <Matthew.Wilson@53.com>

tests/test_url.py

@@ -46,6 +46,8 @@
     u'http://😉.com/😁',
     u'http://উদাহরণ.বাংলা',
     u'http://xn--d5b6ci4b4b3a.xn--54b7fta0cc',
+    u'http://дом-м.рф/1/asdf',
+    u'http://xn----gtbybh.xn--p1ai/1/asdf',
     u'http://-.~_!$&\'()*+,;=:%40:80%2f::::::@example.com',
     u'http://1337.net',
     u'http://a.b-c.de',

validators/url.py

@@ -69,13 +69,13 @@
     r"(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])"
     r")\]|"
     # host name
-    r"(?:(?:(?:xn--)|[a-z\u00a1-\uffff\U00010000-\U0010ffff0-9]-?)*"
+    r"(?:(?:(?:xn--[-]{0,2})|[a-z\u00a1-\uffff\U00010000-\U0010ffff0-9]-?)*"
     r"[a-z\u00a1-\uffff\U00010000-\U0010ffff0-9]+)"
     # domain name
-    r"(?:\.(?:(?:xn--)|[a-z\u00a1-\uffff\U00010000-\U0010ffff0-9]-?)*"
+    r"(?:\.(?:(?:xn--[-]{0,2})|[a-z\u00a1-\uffff\U00010000-\U0010ffff0-9]-?)*"
     r"[a-z\u00a1-\uffff\U00010000-\U0010ffff0-9]+)*"
     # TLD identifier
-    r"(?:\.(?:(?:xn--[a-z\u00a1-\uffff\U00010000-\U0010ffff0-9]{2,})|"
+    r"(?:\.(?:(?:xn--[-]{0,2}[a-z\u00a1-\uffff\U00010000-\U0010ffff0-9]{2,})|"
     r"[a-z\u00a1-\uffff\U00010000-\U0010ffff]{2,}))"
     r")"
     # port number