Wrong indices with uppercase characters in domain name

[tkrissuu]

I am getting wrong indices when the domain name of a URL contains uppercase characters.

To reproduce:

from urlextract import URLExtract
extractor = URLExtract()
urls = extractor.find_urls("www.Google.com", get_indices=True)
print(urls[0])
urls = extractor.find_urls("www.google.com", get_indices=True)
print(urls[0])

Output is:

('www.Google.com', (1, 15))
('www.google.com', (0, 14))

[elliotwutingfeng]

While URI paths can have uppercase characters, the scheme and authority of the URI is always lowercase, though web browsers would normally auto-correct the scheme and authority to lowercase. I think the problem has to do with the regex expression found in gen_urls() failing to account for uppercase characters in the URI scheme and authority.