Change-log.md

@@ -2,6 +2,17 @@
 
 Please note all dates are expressed as [ISO-8601](http://en.wikipedia.org/wiki/ISO_8601).
 
+# 6.4 - 2018-06
+## New features
+* `[/info/biotypes/groups]` endpoint to retrieve list of available biotype groups
+* `[/info/biotypes/groups/:group/:object_type]` endpoint to retrieve the properties of biotypes within provided group (and object_type)
+* `[/info/biotypes/name/:name/:object_type]` endpoint to retrieve the properties of biotypes with provided name (and object_type)
+
+## Updated endpoints
+* `[/vep/:species/*]` updated the frequency keys in the collocated variants entry from *_maf to *_af. The new naming better reflects that we only report allele frequencies from co-located variants if the input allele is matched
+* `[/variation]` added genotyping_chips option to the variation endpoint
+* `[/family]` the output of the family endpoint changed
+
 # 6.3 - 2018-04
 * `[/phenotype/gene/:species/:gene]` New endpoint to return phenotype annotations for a given gene
 * Added ambiguity flag to VEP endpoints