Fix version incompatibilities for Dingo

Author: shalvah

dingo.composer.json

@@ -29,9 +29,9 @@
         "symfony/var-exporter": "^4.0|^5.0"
     },
     "require-dev": {
-        "dingo/api": "^2.7|^3.0",
+        "dingo/api": "^2.3",
         "dms/phpunit-arraysubset-asserts": "^0.1.0",
-        "league/fractal": "^0.19.0",
+        "league/fractal": "^0.17.0",
         "orchestra/testbench": "^3.7|^4.0|^5.0",
         "phpstan/phpstan": "^0.11.15",
         "phpunit/phpunit": "^8.0"