Adds 2.7.10 CHANGELOG

Author: weierophinney

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 All notable changes to this project will be documented in this file, in reverse chronological order by release.
 
-## 2.7.10 - TBD
+## 2.7.10 - 2017-12-05
 
 ### Added
 
@@ -22,7 +22,10 @@ All notable changes to this project will be documented in this file, in reverse
 
 ### Fixed
 
-- Nothing.
+- [#210](https://github.com/zendframework/zend-servicemanager/pull/210) fixes a
+  regression whereby factories accepting creation options were receiving an
+  empty array versus a `null` value when no options were present for a
+  particular invocation; they now correctly receive a `null` value.
 
 ## 2.7.9 - 2017-11-27