add psalm and phpstan to lib (#549)

Author: matthewtrask

composer.json

@@ -28,8 +28,10 @@
         "illuminate/contracts": "~5.0",
         "mockery/mockery": "^1.3",
         "pagerfanta/pagerfanta": "~1.0.0",
+        "phpstan/phpstan": "^1.4",
         "phpunit/phpunit": "^9.5",
         "squizlabs/php_codesniffer": "~3.4",
+        "vimeo/psalm": "^4.22",
         "zendframework/zend-paginator": "~2.3"
     },
     "suggest": {