Update CHANGELOG and the server version

CHANGELOG.md

@@ -5,6 +5,25 @@ 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).
 
+## \[2.1.0] - Unreleased
+### Added
+- TDB
+
+### Changed
+- TDB
+
+### Deprecated
+- TDB
+
+### Removed
+- TDB
+
+### Fixed
+- TDB
+
+### Security
+- TDB
+
 ## \[2.0.0] - 2022-03-04
 ### Added
 - Handle attributes coming from nuclio detectors (<https://github.com/openvinotoolkit/cvat/pull/3917>)

cvat/__init__.py

@@ -4,6 +4,6 @@
 
 from cvat.utils.version import get_version
 
-VERSION = (2, 0, 0, 'final', 0)
+VERSION = (2, 1, 0, 'alpha', 0)
 
 __version__ = get_version(VERSION)