Updated package dependencies

Author: Bas Peters

.travis.yml

@@ -1,9 +1,5 @@
 language: php
 php:
-  - '5.5'
-  - '5.6'
-  - '7.0'
-  - '7.1'
   - '7.2'
 install:
   - composer install

README.md

@@ -39,7 +39,7 @@ try {
  ## Requirements
  - CM account with credits, you can register here [https://register.cmtelecom.com](https://register.cmtelecom.com).
  - Composer installed, or load manually
- - PHP >= 5.5
+ - PHP >= 7.2
 
  ## Installation
  Run the following command in the root of your project to add the CM Messaging SDK to your project dependencies:

composer.json

@@ -13,7 +13,7 @@
     "package"
   ],
   "homepage": "https://www.cmtelecom.com",
-  "license": "Apache 2.0",
+  "license": "Apache-2.0",
   "type": "library",
   "authors": [
     {
@@ -28,13 +28,13 @@
   "require": {
     "php": ">=5.4.0",
     "myclabs/php-enum": "1.5.*",
-    "php-http/httplug": "1.1.*",
-    "guzzlehttp/psr7": "1.4.*"
+    "php-http/httplug": "2.1.*",
+    "guzzlehttp/psr7": "1.6.*"
   },
   "require-dev": {
-    "php-http/mock-client": "0.3.*",
+    "php-http/mock-client": "1.3.*",
     "fzaninotto/faker": "1.6.*",
-    "phpunit/phpunit": "4.*"
+    "phpunit/phpunit": "^8.5"
   },
   "autoload": {
     "psr-4": {