ADDED composer.lock for Snyk

Author: infobip-ci

.gitignore

@@ -3,10 +3,6 @@
 composer.phar
 /vendor/
 
-# Commit your application's lock file https://getcomposer.org/doc/01-basic-usage.md#commit-your-composer-lock-file-to-version-control
-# You may choose to ignore a library lock file http://getcomposer.org/doc/02-libraries.md#lock-file
-composer.lock
-
 # php-cs-fixer cache
 .php_cs.cache
 .php-cs-fixer.cache

CHANGELOG.md

@@ -4,6 +4,11 @@ All notable changes to the library will be documented in this file.
 
 The format of the file is based on [Keep a Changelog](http://keepachangelog.com/) and this library adheres to [Semantic Versioning](http://semver.org/) as mentioned in the [README.md][readme] file.
 
+## [ [5.1.1](https://github.com/infobip/infobip-api-php-client/releases/tag/5.1.1) ] - 2023-05-19
+
+### Changed
+- Added composer.lock for Snyk
+
 ## [ [5.1.0](https://github.com/infobip/infobip-api-php-client/releases/tag/5.1.0) ] - 2023-04-24
 
 ⚠️ **IMPORTANT NOTE:** Obsolete models that are not used since release 5.0.0 have been removed. You should not use them anymore.