docs: remove flespakket (#532)

Author: joerivanveen

composer.json

@@ -4,7 +4,6 @@
     "description": "This package is designed to send and receive data from MyParcel by means of an API.",
     "keywords": [
         "MyParcel",
-        "Flespakket",
         "PostNL"
     ],
     "homepage": "https://myparcelnl.github.io/sdk",