updating composer

Author: preetishishodia7

.travis.yml

@@ -2,6 +2,9 @@ language: php
 sudo: false
 php:
     - 7.2.5
+    - 7.4
     - 8.0
+    - 8.1
+    - 8.2
 before_install: "composer install"
 script: "vendor/bin/phpunit"