Add a changelog

Author: bgrant

CHANGELOG.md

@@ -0,0 +1,11 @@
+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+# [Unreleased]
+- [PR 1](https://github.com/salesforce/django-declarative-apis/pull/1) Set up Dependabot, PR checks, and a CHANGELOG
+
+## [1.0.0] - 2023-11-15
+- Initial release