chore(js): add .ts files editorconfig and fix styling

.editorconfig

@@ -3,7 +3,7 @@
 # top-most EditorConfig file
 root = true
 
-[*.{html,css,js,json,svg,toml}]
+[*.{html,css,js,json,svg,ts,toml}]
 indent_style = tab
 indent_size = 2
 end_of_line = lf

CHANGELOG.md

@@ -4,6 +4,14 @@ All notable changes to this project will be documented in this file.
 
 ## [unreleased]
 
+### Bug Fixes
+
+- Replace deprecated substr() with substring() and add checks for promise results
+
+### Documentation
+
+- Add type definitions for Calendar and SpaceApi
+
 ### Features
 
 - Add git-cliff to update the CHANGELOG.md