CHANGELOG.md in ngt-0.3.0 vs CHANGELOG.md in ngt-0.3.1

@@ -1,4 +1,9 @@
+## 0.3.1 (2020-05-17)
+
+- Updated NGT to 1.11.5
+- Improved error message when OpenMP not found on Mac
+
 ## 0.3.0 (2020-03-25)
 
 - Updated NGT to 1.10.0
 - Added support for OpenMP on Mac
 - Create index in memory if no path specified