Add pypi badge (#81)

Author: flying-sheep

README.rst

@@ -1,7 +1,10 @@
-|docs| |ci| |cov| |bench|
+|pypi| |docs| |ci| |cov| |bench|
 
-.. |docs| image:: https://readthedocs.com/projects/icb-fast-array-utils/badge/?version=latest
-   :target: https://icb-fast-array-utils.readthedocs-hosted.com/en/latest/
+.. |pypi| image:: https://img.shields.io/pypi/v/fast-array-utils
+   :target: https://pypi.org/project/fast-array-utils/
+
+.. |docs| image:: https://app.readthedocs.com/projects/icb-fast-array-utils/badge/
+   :target: https://icb-fast-array-utils.readthedocs-hosted.com/
 
 .. |ci| image:: https://github.com/scverse/fast-array-utils/actions/workflows/ci.yml/badge.svg
    :target: https://github.com/scverse/fast-array-utils/actions/workflows/ci.yml

pyproject.toml

@@ -10,7 +10,7 @@ authors = [
 ]
 requires-python = ">=3.11"
 classifiers = [
-  "Development Status :: 4 - Beta",
+  "Development Status :: 5 - Production/Stable",
   "Intended Audience :: Developers",
   "Programming Language :: Python :: 3 :: Only",
   "Programming Language :: Python :: 3.11",