#325: Add release notes.

docs/RELEASE_NOTES.md

@@ -45,11 +45,14 @@
     - **Commons** - Moved documentation of sync options to a separate [doc](/docs/usage/SYNC_OPTIONS.md).
     - **Commons** - Added a the earliest compatible version of the commercetools-jvm-sdk](https://github.com/commercetools/commercetools-jvm-sdk) as a prerequisite for using the library.
 
-- 🛠️ **Enhancements** (11)
-    - **ProductType Sync** - Added `ProductTypeSyncBenchmark` to benchmark the product type sync, to be able to compare the performance of the sync with the future releases. [#301](https://github.com/commercetools/commercetools-sync-java/issues/301)
+- 🛠️ **Enhancements** (16)
+    - **ProductType Sync** - Added concurrnency modification exception handeling. [#325](https://github.com/commercetools/commercetools-sync-java/issues/325)
+    - **Commons** - `ProductSyncUtils#buildActions`, `CategorySyncUtils#buildActions`, `InventorySyncUtils#buildActions` and `ProductTypeSyncUtils#buildActions` now don't apply the `beforeUpdateCallback` implicitly. 
+        If you want you can apply it explicitly on the result. [#302](https://github.com/commercetools/commercetools-sync-java/issues/302)
     - **Product Sync** - Reference keys are not validated if they are in UUID format anymore. [#166](https://github.com/commercetools/commercetools-sync-java/issues/166)
     - **Category Sync** - Reference keys are not validated if they are in UUID format anymore. [#166](https://github.com/commercetools/commercetools-sync-java/issues/166)
     - **Inventory Sync** - Reference keys are not validated if they are in UUID format anymore. [#166](https://github.com/commercetools/commercetools-sync-java/issues/166)
+    - **ProductType Sync** - Added `ProductTypeSyncBenchmark` to benchmark the product type sync, to be able to compare the performance of the sync with the future releases. [#301](https://github.com/commercetools/commercetools-sync-java/issues/301)
     - **Commons** - Bumped commercetools-jvm-sdk to version [1.37.0](http://commercetools.github.io/commercetools-jvm-sdk/apidocs/io/sphere/sdk/meta/ReleaseNotes.html#v1_37_0).
     - **Commons** - Bumped `mockito` to 2.23.4.
     - **Commons** - Bumped `com.adarshr.test-logger` to 1.6.0.
@@ -60,9 +63,6 @@
     - **Commons** - Bumped `com.adarshr.test-logger` to 1.6.0.
     - **Commons** - Bumped `org.ajoberstar.grgit` to 3.0.0.
     - **Commons** - Bumped gradle to version [gradle-5.0](https://docs.gradle.org/5.0/release-notes.html)
-    - **Commons** - `ProductSyncUtils#buildActions`, `CategorySyncUtils#buildActions`, `InventorySyncUtils#buildActions` and `ProductTypeSyncUtils#buildActions` now don't apply the `beforeUpdateCallback` implicitly. 
-    If you want you can apply it explicitly on the result. [#302](https://github.com/commercetools/commercetools-sync-java/issues/302)
-    
 
 - 🚧 **Breaking Changes** (11) 
     - **Product Sync** - `allowUuid` option is now removed. [#166](https://github.com/commercetools/commercetools-sync-java/issues/166)