Update changelog

Author: flozz

README.md

@@ -15,6 +15,10 @@ Documentation:
 
 ## Changelog
 
+* **[NEXT]** (changes on master but not released yet):
+
+  * Fixed addStructure method (@elektree, #47)
+
 * **4.0.0:** Updates abitbol-serializable to 2.0.0
 * **3.2.0:** Adds history function to apply currently pointed snapshot and fixes tests
 * **3.1.4:** Fixes obsidian-file options never forwarded on save (#31)