add types classifier and badge (#1272)

Author: yangdanny97

README.rst

@@ -4,7 +4,7 @@
 
 A Concrete Syntax Tree (CST) parser and serializer library for Python
 
-|support-ukraine| |readthedocs-badge| |ci-badge| |pypi-badge| |pypi-download| |notebook-badge|
+|support-ukraine| |readthedocs-badge| |ci-badge| |pypi-badge| |pypi-download| |notebook-badge| |types-badge|
 
 .. |support-ukraine| image:: https://img.shields.io/badge/Support-Ukraine-FFD500?style=flat&labelColor=005BBB
    :alt: Support Ukraine - Help Provide Humanitarian Aid to Ukraine.
@@ -31,6 +31,10 @@ A Concrete Syntax Tree (CST) parser and serializer library for Python
    :target: https://mybinder.org/v2/gh/Instagram/LibCST/main?filepath=docs%2Fsource%2Ftutorial.ipynb
    :alt: Notebook
 
+.. |types-badge| image:: https://img.shields.io/pypi/types/libcst
+   :target: https://pypi.org/project/libcst
+   :alt: PYPI - Types
+
 .. intro-start
 
 LibCST parses Python 3.0 -> 3.13 source code as a CST tree that keeps

pyproject.toml

@@ -15,6 +15,7 @@ classifiers = [
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Typing :: Typed",
 ]
 requires-python = ">=3.9"
 dependencies = ["pyyaml>=5.2"]