sources: parse more profile url formats.

Add support for parsing these URL formats:

* https://www.artstation.com/felipecartin/profile
* https://www.deviantart.com/nlpsllp/gallery
* https://fantia.jp/asanagi
* https://www.lofter.com/front/blog/home-page/noshiqian
* https://www.lofter.com/app/xiaokonggedmx
* https://www.lofter.com/blog/semblance
* https://q.nicovideo.jp/users/18700356
* https://dic.nicovideo.jp/u/11141663
* https://3d.nicovideo.jp/users/109584
* https://3d.nicovideo.jp/u/siobi
* https://game.nicovideo.jp/atsumaru/users/7757217
* https://www.pixiv.net/user/13569921/series/81967
* https://pixiv.cc/zerousagi/
* https://www.plurk.com/u/ddks2923
* https://www.plurk.com/m/u/leiy1225
* https://www.plurk.com/s/u/salmonroe13
* https://www.plurk.com/RSSSww/invite/4
* https://skeb.jp/@okku_oxn/works
* https://www.tumblr.com/blog/view/artofelaineho/187614935612
* https://www.tumblr.com/blog/view/artofelaineho
* https://www.tumblr.com/blog/artofelaineho
* https://www.tumblr.com/dashboard/blog/dankwartart
* https://rosarrie.tumblr.com/archive
* https://whereisnovember.tumblr.com/tagged/art
* https://twitpic.com/photos/Type10TK
* https://www.weibo.com/detail/4676597657371957
* https://www.weibo.com/u/5957640693/home?wvr=5
* https://www.weibo.com/lvxiuzi0/home

app/logical/source/url/skeb.rb

@@ -10,10 +10,6 @@ class Source::URL::Skeb < Source::URL
   def parse
     case [domain, *path_segments]
 
-    # https://skeb.jp/@asanagi
-    in "skeb.jp", /^@/ => username
-      @username = username.delete_prefix("@")
-
     # https://skeb.jp/@OrvMZ/works/3 (non-watermarked)
     # https://skeb.jp/@OrvMZ/works/1 (separated request and client's message after delivery)
     # https://skeb.jp/@asanagi/works/16 (age-restricted, watermarked)
@@ -23,6 +19,11 @@ class Source::URL::Skeb < Source::URL
       @username = username.delete_prefix("@")
       @work_id = work_id
 
+    # https://skeb.jp/@asanagi
+    # https://skeb.jp/@okku_oxn/works
+    in "skeb.jp", /^@/ => username, *rest
+      @username = username.delete_prefix("@")
+
     # https://skeb.imgix.net/requests/199886_0?bg=%23fff&auto=format&w=800&s=5a6a908ab964fcdfc4713fad179fe715
     # https://skeb.imgix.net/requests/73290_0?bg=%23fff&auto=format&txtfont=bold&txtshad=70&txtclr=BFFFFFFF&txtalign=middle%2Ccenter&txtsize=150&txt=SAMPLE&w=800&s=4843435cff85d623b1f657209d131526
     # https://skeb.imgix.net/requests/53269_1?bg=%23fff&fm=png&dl=53269.png&w=1.0&h=1.0&s=44588ea9c41881049e392adb1df21cce (full size)