Removed dangling comma

Author: ruudboon

composer.json

@@ -30,7 +30,7 @@
  "codeception/util-robohelpers": "dev-master",
  "vlucas/phpdotenv": "^4.1",
  "squizlabs/php_codesniffer": "^3.4",
- "vimeo/psalm": "^3.6",
+ "vimeo/psalm": "^3.6"
  },
  "autoload":{
  "classmap": ["src/"]