[pixiv] transition to pixiv public api

config

@@ -1,5 +1,6 @@
-[pixiv-cookies]
-PHPSESSID = XXXXX
+[pixiv]
+username = XXXXX
+password = XXXXX
 
 [exhentai-cookies]
 ipb_member_id = XXXXX
@@ -14,4 +15,4 @@ nijie_login_hash = XXXXX
 regex0 = d(?:anbooru)?[.:-_](\w.+)
 
 [gelbooru]
-regex0 = g(?:elbooru)?[.:-_](\w.+)
+regex0 = g(?:elbooru)?[.:-_](\w.+)