docs(changelog): note packaging alignment for 0.1.0

Author: Autumn-Atlas

CHANGELOG.md

@@ -12,6 +12,16 @@
 - Aligned `search()` parameters with the current documented API surface.
 - Modernized packaging metadata: updated repository URL, classifiers, and dependency pins.
 - Unified package version to `0.1.0` across `setup.py` and `currentsapi/__init__.py`.
+- Single-sourced the version: `setup.py` now reads `__version__` from
+  `currentsapi/__init__.py` instead of duplicating it.
+- Replaced the deprecated `tests_require` argument with an `extras_require`
+  `"dev"` extra (`pip install currentsapi[dev]`).
+- Removed obsolete `setup.cfg`: the `description-file` metadata key is
+  deprecated and the `universal` wheel flag is incorrect for a Python 3-only
+  package.
+- README now clarifies that the PyPI distribution name is `currentsapi`
+  (matching the 0.0.1/0.0.2 releases), documents `CurrentsAPIError` handling,
+  and states the supported Python versions.
 - Updated README with current docs link and usage examples.
 
 ### Fixed