Add changelog

Fixes #132

Author: smheidrich

CHANGELOG.md

@@ -0,0 +1,33 @@
+# Changelog
+
+## 0.4.31
+
+- **Interface changes:**
+  - Some exception messages related to BigInt support in PyPy may have changed.
+    - This should not affect the vast majority of users and whether exact
+      exception messages are part of the interface is up for debate, so it's
+      not considered a breaking change.
+- **Packaging improvements:**
+  - The artifacts published to PyPI now come with
+    [attestations](https://docs.pypi.org/attestations/).
+- **Fixed bugs:**
+  - Using json-stream-rs-tokenizer with Python 3.14 would segfault. This should
+    no longer happen.
+- **Python/library compatibility changes:**
+  - Added wheels for Python 3.14.
+  - Dropped support for Python 3.7 (all variants) and PyPy versions other than
+    3.11.
+    - This is not considered a breaking change, and hence doesn't necessitate a
+      (pseudo)-major version release, because it should be "invisible" to
+      people using now-unsupported Python versions: Package installers will
+      simply not resolve to json-strema-rs-tokenizer 0.4.31.
+  - To avoid issues like the segfaults when used with Python 3.14 in the
+    future, json-stream-rs-tokenizer now specifies an upper bound for the
+    supported Python versions (currently `<3.15`) which will only be raised
+    after testing that a new Python version works fine.
+
+## 0.4.30 and below
+
+*I only started writing a changelog starting at 0.4.31. For older versions,
+please have a look at the commit history and the `v`-prefixed tags attached to
+commits.*

README.md

@@ -140,3 +140,9 @@ manually.
 MIT license. Refer to the
 [LICENSE](https://github.com/smheidrich/py-json-stream-rs-tokenizer/blob/main/LICENSE)
 file for details.
+
+## Changelog
+
+Refer to the
+[CHANGELOG.md](https://github.com/smheidrich/py-json-stream-rs-tokenizer/blob/main/CHANGELOG.md)
+file.