Update CHANGELOG

Signed-off-by: GZGavinZhao <74938940+GZGavinZhao@users.noreply.github.com>

Author: GZGavinZhao

CHANGELOG.md

@@ -1,30 +1,46 @@
 # 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/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [1.1.0] - 2021-12-25
+
 ### Fixed
-- Outdated project template.
-- Inconsistent extra lines when error occurs.
+
+- Fix outdated project template.
+- Fix inconsistent extra lines when error occurs.
+- Back to null safety.
+
 ### Removed
-- `build` and `serve` command. Very hard to maintain & build a global package
+
+- Remove `build` and `serve` command. Very hard to maintain & build a global package
   that uses null-safety itself but contains some unsound-null-safety code.
 
 ## [1.0.2] - 2021-06-14
+
 ### Fixed
+
 - Fix missing `.gitignore` file (isn't generated when creating).
+
 ### Added
+
 - Run `pub get` after creating a new project.
+
 ### Removed
-- Remoed unnecessary models, though this doesn't affect the program at all
+
+- Remove unnecessary models, though this doesn't affect the program at all
 
 ## [1.0.1] - 2021-05-31
+
 ### Fixed
+
 - Duplicate usage message on `UsageException`.
 - Symbols in debug logs can't show on some devices due to the use of illegal characters.
 
 ## [1.0.0] - 2021-05-30
+
 ### Added
+
 - Initial version.