docs: Update CHANGELOG (toml-rs#198)

CHANGELOG.md

@@ -6,6 +6,18 @@ The format is based on [Keep a Changelog].
 
 ## [Unreleased]
 
+## [0.3.0] - 2021-09-??
+
+- Added support for TOML 1.0, with [one functional caveat](https://github.com/ordian/toml_edit/issues/128) and [one format-preserving caveat](https://github.com/ordian/toml_edit/issues/163)
+- Added `Item::into_value`
+- Changed `Table` and `InlineTable` to be more Map-like
+- Expanded support in `TableLike`
+- Added [toml-rs](https://docs.rs/toml)-compatible API via the `toml_edit::easy` module for when developers want to ensure consistency between format-preserving and general TOML work, with [one caveat](https://github.com/ordian/toml_edit/issues/192).
+- Exposed more control over formatting, with ability to modify any key or value whitespace.
+- Fixed it so we preserve formatting on dotted keys in standard table headers
+- Dropped `chrono` dependency
+
+
 ## [0.2.1] - 2021-06-07
 - Added `Table::decor`. [#97](https://github.com/ordian/toml_edit/pull/97)
 - Added `IterMut` for `Table`. [#100](https://github.com/ordian/toml_edit/pull/100)