Add changelog

Author: laurynas

CHANGELOG.md

@@ -0,0 +1,21 @@
+# 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/1.1.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+
+## v2.0.0
+
+### Added
+- `getLanguages()` method to get supported languages
+- `getAccountStatus()` method to get account status
+
+### Changed
+- Switched to v3 API which uses updated language detection model
+- ⚠️ `detect()` method result fields are `language` and `score`
+- `simpleDetect()` renamed to `detectCode()`
+
+### Removed
+- Secure mode configuration. HTTPS is used by default.

README.md

@@ -34,6 +34,10 @@ dependencies {
 }
 ```
 
+### Upgrading
+
+When upgrading please check [changelog](CHANGELOG.md) for breaking changes.
+
 ## Usage
 
 ```java