DATAES-440 - Updated changelog.

Author: christophstrobl

src/main/resources/changelog.txt

@@ -1,6 +1,18 @@
 Spring Data Elasticsearch Changelog
 ===================================
 
+Changes in version 3.1.0.M3 (2018-05-17)
+----------------------------------------
+* DATAES-451 - Adapt to SpEL extension API changes in Spring Data Commons.
+* DATAES-440 - Release 3.1 M3 (Lovelace).
+* DATAES-422 - Add support for IndicesOptions in search queries.
+* DATAES-420 - Analyzer of main field ignored when using @MultiField annotation.
+* DATAES-412 - Highlighted fields is not getting passed to the elastic search query.
+* DATAES-363 - AbstractElasticsearchRepository.existsById(..) always returns true.
+* DATAES-312 - NullHandling.NULLS_LAST not working in query.sort.
+* DATAES-198 - @Version has no effect, so therefore is not useful with spring data elasticsearch.
+
+
 Changes in version 3.0.7.RELEASE (2018-05-08)
 ---------------------------------------------
 * DATAES-438 - Expected a boolean [true/false] for property [index] but got [not_analyzed].