Revert "Use the modular api-platform packages instead of the monolitic api-platform/core package"

This reverts commit 17caf47.

Author: jbtronics

composer.json

@@ -12,9 +12,7 @@
         "ext-json": "*",
         "ext-mbstring": "*",
         "amphp/http-client": "^5.1",
-        "api-platform/doctrine-orm": "^3",
-        "api-platform/json-api": "^3.4",
-        "api-platform/symfony": "^3",
+        "api-platform/core": "^3.1",
         "beberlei/doctrineextensions": "^1.2",
         "brick/math": "0.12.1 as 0.11.0",
         "composer/ca-bundle": "^1.3",