Updated changelog

Author: sea5kg

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to wsjcpp-core project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [v0.2.3] - 2023-02-01 (2023 Feb 1)
+
+### Added
+
+- New functions: startsWith and endssWith
+
 ## [v0.2.2] - 2021-09-04 (2021 Sept 4)
 
 ### Added

README.md

@@ -456,3 +456,23 @@ if (WsjcppCore::recoursiveRemoveDir("./folder2")) {
     // everything removed
 }
 ```
+
+### startsWith
+
+Test string starts with substring
+
+```
+if (WsjcppCore::startsWith("123456", "123")) {
+    // true
+}
+```
+
+### endsWith
+
+Test string starts with substring
+
+```
+if (WsjcppCore::startsWith("123456", "456")) {
+    // true
+}
+```