Current version in NEWS.md 0.5.900

Change-Id: Id0b248c519fc436088fcdf39f8fc8941c3917d54
diff --git a/NEWS.md b/NEWS.md
index 4393d3a..e299e61 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,4 +1,5 @@
-# RKorAPClient 0.5.10
+# RKorAPClient 0.5.900
+
 ## Changes
 - collocationScoreQuery method added
 - hc_add_onclick_korap_search function added