Add 4 Serbian URL shortener domains ({sn, jz, skr, sk.in}.rs) (#138)

Author: milankragujevic

list

@@ -632,6 +632,7 @@ jnfusa.org
 joo.gl
 jp.rog.gg
 jpeg.ly
+jz.rs
 k-p.li
 kas.pr
 kask.us
@@ -1114,8 +1115,10 @@ sinyi.biz
 sinyi.in
 siriusxm.us
 siteco.re
+sk.in.rs
 skimmth.is
 skl.sh
+skr.rs
 skrat.it
 skyurl.cc
 slidesha.re
@@ -1129,6 +1132,7 @@ smsng.news
 smsng.us
 smtvj.com
 smu.gs
+sn.rs
 snd.sc
 sndn.link
 snip.link