dependencies: remove jsoniter from dependencies and replace its usage

with gson

Jsoniter is a JSON parser that doesn't have support for java 17+ and
doesn't seem to support it, making this project unable to run
on versions other than java 11. Gson was chosen as a replacement, since
it seems to be a well supported library, along jackson and org.json

Change-Id: I3d9375c6da0d70b1d8df942f99747da26bf92ee2