bump psalm/plugin-phpunit

Author: mmoll

composer.json

@@ -34,7 +34,7 @@
         "phpstan/phpstan": "^1.0",
         "phpstan/phpstan-strict-rules": "^1.0",
         "phpunit/phpunit": "^7.0",
-        "psalm/plugin-phpunit": "^0.16.1",
+        "psalm/plugin-phpunit": "^0.17",
         "vimeo/psalm": "^4.5.2"
     },
     "config": {