Update readme and release notes

README.md

@@ -7,7 +7,7 @@
 [![supported languages](https://img.shields.io/badge/supported%20languages-75-green.svg)](#3-which-languages-are-supported)
 [![docs](https://img.shields.io/badge/docs-API-yellowgreen)](https://pemistahl.github.io/lingua-py)
 ![supported Python versions](https://img.shields.io/badge/Python-%3E%3D%203.8-blue)
-[![pypi](https://img.shields.io/badge/PYPI-v1.3.1-blue)](https://pypi.org/project/lingua-language-detector)
+[![pypi](https://img.shields.io/badge/PYPI-v1.3.2-blue)](https://pypi.org/project/lingua-language-detector)
 [![license](https://img.shields.io/badge/license-Apache%202.0-blue.svg)](https://www.apache.org/licenses/LICENSE-2.0)
 </div>
 

RELEASE_NOTES.md

@@ -1,3 +1,11 @@
+## Lingua 1.3.2 (released on 29 Jan 2023)
+
+### Improvements
+
+- After applying some internal optimizations, language detection is now
+  faster, at least between 20% and 30%, approximately. For long input texts,
+  the speed improvement is greater than for short input texts.
+
 ## Lingua 1.3.1 (released on 04 Jan 2023)
 
 ### Bug Fixes