Fix bug with missing message collector

[justinpolygon]

Fixes #144. Added missing message collector for websocket event.

No messages were coming through when running the KotlinStocksWebsocketSample.kt via KotlinUsageSample.kt when stocksWebsocketSample(polygonKey) was uncommented. After fixing this bug and rerunning you'll see events being passed correctly (like below).

...
Receieved Message: Trade(eventType=T, ticker=ACN, exchangeId=4, tradeId=71697218885707, tape=1, price=339.47, size=6.0, conditions=[37], timestampMillis=1704310583363, sequenceNumber=1338647, trf=202, trfTimestampMillis=1704310583363)
Receieved Message: Trade(eventType=T, ticker=LLY, exchangeId=4, tradeId=71697218885699, tape=1, price=617.97, size=1.0, conditions=[37], timestampMillis=1704310583349, sequenceNumber=1932601, trf=202, trfTimestampMillis=1704310583349)
Receieved Message: Trade(eventType=T, ticker=XOM, exchangeId=4, tradeId=71697218885199, tape=1, price=103.385, size=100.0, conditions=[], timestampMillis=1704310583254, sequenceNumber=2003481, trf=202, trfTimestampMillis=1704310583254)
...

[mmoghaddam385]

oof good catch