fix composer.lock, update composer.json, fix travis.yml to travis CI

Author: geekcom

.travis.yml

@@ -9,9 +9,10 @@ before_script:
   - composer self-update
   - travis_retry composer update --no-interaction --no-ansi --no-progress --no-suggest --optimize-autoloader
   - composer install --prefer-source --no-interaction --dev
+  - echo 'xdebug.mode = coverage' >> ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/travis.ini
 
 script:
   - composer test
 
 after_success:
-  - php vendor/bin/php-coveralls --verbose
+  - php vendor/bin/php-coveralls --verbose

composer.json

@@ -19,7 +19,7 @@
     "php": "^7.2"
   },
   "require-dev": {
-    "phpunit/phpunit": "^8.4",
+    "phpunit/phpunit": "^8.4|^9.4",
     "php-coveralls/php-coveralls": "^2.2",
     "squizlabs/php_codesniffer": "*",
     "phpstan/phpstan": "^0.12.5"