chore: prepare initial release 0.1.0

CHANGELOG.md

@@ -5,11 +5,19 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-## 0.1.0 - TBD
+## 0.1.0 - 2021-11-15
 
 ### Added
 
-- Nothing.
+- Initial release of base functionality:
+  - `FormatPHP\FormatPHP::formatMessage()` to format messages
+  - Message extraction from application source code through `formatphp extract`
+    console command
+  - Message loading of locale messages in 3 formats: FormatPHP, Simple, and
+    Smartling
+  - `FormatPHP\Intl\Locale` and `FormatPHP\Intl\MessageFormat` for basic
+    conformance with [ECMA-402](https://tc39.es/ecma402/) and
+    [FormatJS](https://formatjs.io)
 
 ### Changed