chore(doc): prepare 1.4.0 release (#79)

Author: HerrCai0907

.github/CODEOWNERS

@@ -1 +1,5 @@
-* @wasm-ecosystem/assemblyscript-unittest-framework-team
+./assembly @wasm-ecosystem/assemblyscript-unittest-framework-team
+./bin @wasm-ecosystem/assemblyscript-unittest-framework-team
+./instrumentation @wasm-ecosystem/assemblyscript-unittest-framework-team
+./src @wasm-ecosystem/assemblyscript-unittest-framework-team
+./transform @wasm-ecosystem/assemblyscript-unittest-framework-team

docs/release-note.md

@@ -1,6 +1,6 @@
 # Release Note
 
-## latest
+## 1.4.0
 
 🚀 Highlight Features
 
@@ -24,7 +24,7 @@
 
 🛠️ Improvements
 
-- Proper handling of situations where AS files are not invalid.
+- Proper handling of situations where AS files are invalid.
 
 ## 1.3.0