Flesh out history

Author: Tinche

HISTORY.md

@@ -5,9 +5,9 @@
 - Fix a regression when unstructuring dictionary values typed as `Any`.
   ([#453](https://github.com/python-attrs/cattrs/issues/453) [#462](https://github.com/python-attrs/cattrs/pull/462))
 - Fix a regression when unstructuring unspecialized generic classes.
-  ([#465](https://github.com/python-attrs/cattrs/issues/465))
+  ([#465](https://github.com/python-attrs/cattrs/issues/465) [#466](https://github.com/python-attrs/cattrs/pull/466))
 - Optimize function source code caching.
-  ([#445](https://github.com/python-attrs/cattrs/issues/445))
+  ([#445](https://github.com/python-attrs/cattrs/issues/445) [#464](https://github.com/python-attrs/cattrs/pull/464))
 - Generate unique files only in case of linecache enabled.
   ([#445](https://github.com/python-attrs/cattrs/issues/445) [#441](https://github.com/python-attrs/cattrs/pull/461))