Upgrade dependencies

Author: Mārtiņš Briedis

.travis.yml

@@ -1,10 +1,9 @@
 language: php
 
 php:
-  - 7.1
-  - 7.2
-  - 7.3
-  - 7.4
+  - 8.2
+  - 8.3
+  - 8.4
 
 before_script:
   - travis_retry composer self-update

composer.json

@@ -3,15 +3,15 @@
     "description": "CMS backend for Gettext translation management",
     "type": "library",
     "require": {
-        "php": ">=7.1",
+        "php": ">=8.2",
         "ext-json": "*",
         "ext-zip": "*",
         "ext-gettext": "*",
-        "gettext/gettext": "^4.7.0"
+        "gettext/gettext": "^4.8.12"
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.0",
-        "mockery/mockery": "^1.1",
+        "phpunit/phpunit": "^9.6",
+        "mockery/mockery": "^1.6",
         "mikey179/vfsstream": "^1.6"
     },
     "autoload": {