ChangeLog.md upd

Author: rashtao

ChangeLog.md

@@ -6,9 +6,11 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) a
 
 ## [Unreleased]
 
-- support for `ArangoSearchProperties` value `storedValues` (ArangoDB v3.7)
-- support for `ArangoSearchProperties` value `primarySortCompression` (ArangoDB v3.7)
-- support for `overwriteMode` values `ignore` and `conflict` (ArangoDB v3.7)
+- added support of `DisjointSmartGraphs` 
+- added support of `ArangoSearchProperties` value `storedValues` (ArangoDB v3.7)
+- added support of `ArangoSearchProperties` value `primarySortCompression` (ArangoDB v3.7)
+- added support of `overwriteMode` values `ignore` and `conflict` (ArangoDB v3.7)
+- velocypack v2.3.1
 
 ## [6.6.3] - 2020-05-06