Merge pull request #21 from sivaschenko/php8

PHP8 сompatibility, Stock ticket STK-68866

Author: chfabbro

.travis.yml

@@ -1,8 +1,7 @@
 language: php
 php:
- - 7.1
- - 7.2
  - 7.3
  - 7.4
+ - 8.0
 install: composer install
 script: composer run test

composer.json

@@ -9,13 +9,13 @@
         }
     ],
     "require": {
-        "php": "~7.1",
-        "guzzlehttp/guzzle": "~6.0"
+        "php": ">=7.3",
+        "guzzlehttp/guzzle": "~7.3"
     },
     "require-dev": {
-        "squizlabs/php_codesniffer": "~2.8",
-        "phpunit/phpunit": ">=6.0 <9.0",
-        "mockery/mockery": "^0.9.9"
+        "squizlabs/php_codesniffer": "~3.6.0",
+        "phpunit/phpunit": ">=6.0",
+        "mockery/mockery": "^1.4.3"
     },
     "autoload": {
         "psr-4": {