Merge pull request #460 from doctrine/malarzm-patch-1

Add changelog for 3.4.3

Author: alcaeus

CHANGELOG-3.4.md

@@ -12,6 +12,13 @@ where XXX and YYY are the older and newer versions, respectively.
 To generate a changelog summary since the last version, run
 `git log --no-merges --oneline XXX...HEAD`
 
+3.4.3 (2018-04-19)
+------------------
+
+All issues and pull requests in this release may be found under the [3.4.3 milestone](https://github.com/doctrine/DoctrineMongoDBBundle/issues?q=milestone%3A3.4.3).
+
+ * [458](https://github.com/doctrine/DoctrineMongoDBBundle/pull/458) makes form type guesser ignore unmapped fields instead of throwing an exception
+
 3.4.2 (2018-03-22)
 ------------------