Add release date for v3.0.0

CHANGELOG.md

@@ -4,7 +4,7 @@ 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).
 
-## [3.0.0] - TBD
+## [3.0.0] - 2021-08-04
 ### Added
 - data parameters for repeat grids
 - export options for groups: inline, build method, builder param, custom code
@@ -123,4 +123,4 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [0.1.0] - 2020-05-12
 ### Added
-- initial Early Access release
+- initial Early Access release