update

 # How to use package
-1. Add this code into composer.json of your project
-```
+
+## 1) Add repository to composer.json
+```json
 "repositories": [
   {
     "type": "vcs",
     "url": "git@gitlab.monotos.biz:pvduc/daito-utils.git"
   }
- ]
+]
 ```
-2. Run command to install package
+
+## 2) Install package
+
+### Stable (recommended - install by tag)
+```bash
+composer require daito/lib:^1.0
 ```
-# we use master branch
-# if has any changes it will request to last commit of Master branch default
+
+### Dev (testing latest branch code)
+```bash
 composer require daito/lib:dev-master
 ```
 
-#### **Note**:
+## 3) Update package
+
+### Stable
+```bash
+composer update daito/lib
+```
 
-If package changes, to project updates new changes
+### Dev branch
+```bash
+composer update daito/lib
 ```
-composer update daito/lib:dev-master
+
+## Release by tag
+
+After code is ready on release branch (for example `production`), create and push tag:
+
+```bash
+git tag v1.0.0
+git push origin v1.0.0
+```
+
+Then projects using this package can update to the new stable version:
+
+```bash
+composer require daito/lib:^1.0
+# or
+composer update daito/lib
 ```
\ No newline at end of file

 <?php
 namespace Daito\Lib;
 
-class StringUtils {
+class DaitoString {
     public static function toUpper($text){
-        return strtoupper("$text xxx...");
+        return strtoupper($text);
     }
     public static function toLower($text){
         return strtolower($text);