GROUP-89 Update Parsing Logic

[makmn1]

Description of Changes

Not a bug, but an issue blocking GROUP-89 for Group Sync. Currently, we have this behavior:

1. Server sends an event to a client. The event is serialized, but it also has a nested object which is already serialized, so that ends up being serialized again as a string the second time
2. The client deserializes the event object, but it also deserializes the event data

When making a change in Group Sync to not have the nested event data already serialized, this breaks compatibility with GroupHQ clients since they expect to parse a string. To ensure compatibility with the new changes, as well as backwards compatibility with the old changes (which is needed until Group Sync instances are updated), parsing is now done only if the nested event data is a string. If not, then it should already be deserialized to an object.

Additional Info

This pull request also includes updates to dependencies, which is probably why there is a +5000 -5000 code change count. Probably should put updates in a separate pull request in the future.