Deprecate Sig.issuer_fpr, add changelogs

Signed-off-by: Daniel Alley <dalley@redhat.com>

Author: dralley

NEXT.md

@@ -3,13 +3,16 @@
 v0.1.31
 
 New:
+  - Added `Sig.issuer_fingerprint`, `Sig.issuer_key_id`, `Sig.signers_user_id`, and `Sig.expiration` [#60]
+  - Added docstrings to the `Sig` API [#60]
 
 Changed:
-  - This release changes metadata of the project and the release workflow. There are no functional changes. See changelog for version 0.1.30.
-  - Changed Rust edition from 2021 to 2024.
+  - `Sig.issuer_fpr` is now considered deprecated, use `Sig.issuer_fingerprint` instead [#60]
 
 Removed:
 
+[#60]: https://github.com/wiktor-k/pysequoia/pull/60
+
 ### Release checklist:
 ###  [ ] Change version in `Cargo.toml` and `pyproject.toml` and `NEXT.md`
 ###  [ ] Update dependencies via `cargo update`

src/signature.rs

@@ -62,13 +62,14 @@ impl Sig {
         Ok(crate::serialize(self.sig.clone().into(), None)?.into())
     }
 
-    /// The fingerprint of the key that made this signature, as a lowercase hex string.
+    /// DEPRECATED: The fingerprint of the key that made this signature, as a lowercase hex string.
     ///
-    /// Alias for ``issuer_fingerprint``.
+    /// Alias for ``issuer_fingerprint``. Prefer ``issuer_fingerprint`` going forwards.
     ///
     /// Returns ``None`` if the signature does not carry an issuer fingerprint subpacket.
     /// Prefer this over ``issuer_key_id`` when available, as fingerprints are collision-resistant.
     #[getter]
+    #[deprecated = "Prefer Sig.issuer_fingerprint"]
     pub fn issuer_fpr(&self) -> Option<String> {
         self.sig
             .issuer_fingerprints()