chore: add CHANGELOG

Author: sanjayaksaxena

CHANGELOG.md

@@ -0,0 +1,17 @@
+# [Improved custom entities](https://github.com/winkjs/wink-nlp/releases/tag/0.2.0)
+## Version 0.2.0 July 21, 2020
+
+### ✨ Features
+- We have added `.parentCustomEntity()` API to `.tokens()` API. 👏
+
+#
+### 🐛 Fixes
+- Accessing custom entities was failing whenever there were no custom entities. Now things are as they should be — it tells you that there are none! ✅
+
+
+
+# [Improved interface with language model](https://github.com/winkjs/wink-nlp/releases/tag/0.1.0)
+## Version 0.1.0 June 24, 2020
+
+### ✨ Features
+- We have improved interface with the language model — now supports the new format. 👍