Update bulgarian.yml

Bulgarian letter "Ъ" and "'ъ"  added

scriptshifter/tables/data/bulgarian.yml

@@ -54,3 +54,5 @@ script_to_roman:
     "\u0446": "t\uFE20s\uFE21"
     "\u046A": "U\u0310"
     "\u046B": "u\u0310"
+    "\u042A": "u\016C"
+    "\u044A": "u\016D"