Fix JSONException in Tipeeestream connector

[MelanX]

Description

If you simulate a follow or sub event on Tipeeestream there is a JSONException.

Error Log

83121 16:31:29.757 [EventThread] WARN  impl.TipeeestreamEventInputImpl  - Error while parsing follow json:
83121 16:31:29.757 [EventThread] WARN  impl.TipeeestreamEventInputImpl  - org.json.JSONException - JSONObject["origin"] not found.

References

Discord message

[hlxid]

Test donation events don't contain any currency, which also throws an exception:

73926 19:45:56.706 [EventThread] WARN  impl.TipeeestreamEventInputImpl  - Error while parsing donation json:
73926 19:45:56.706 [EventThread] WARN  impl.TipeeestreamEventInputImpl  - org.json.JSONException - JSONObject["currency"] not found.

This also needs to be fixed.