Add Uta-Net entry for searching J-POP/Anime song lyrics

[anmonite]

Hi jagrosh,

I added "Uta-Net" entry for searching J-POP/Anime song lyrics at reference.conf. Uta-Net: https://www.uta-net.com/

Because I caught assertion error in my trying mvn test on my Marven environment on AWS, I did not test this "Uta-Net" entry. So that you need to run test before merge this pull-request. Could you plz check it?

Best,

[calvinize]

Hi, can you also add https://j-lyric.net/ too? I personally find it more reliable than uta-net. It's my main source of lyrics for J-pop/anime songs.

[anmonite]

Hi, can you also add https://j-lyric.net/ too? I personally find it more reliable than uta-net. It's my main source of lyrics for J-pop/anime songs.

Because of displaying ad modal page, it is difficult to get lyrics from https://j-lyric.net/.