JsonCommandsAsync.GetAsync<T> throws JsonException when not found.

[dominkomin]

NRedisStack Version: 0.10.1

Redis Stack Version: 7.2.2

Description: JsonCommandsAsync.GetAsync throws JsonException when entry not found, while probably default(T) should be returned.

[shacharPash]

Hi @dominkomin, thanks for submitting this issue!
This is indeed a bug, the problem is in cases where Redis returns null but the result is still considered a BulkString, therefore the function tries to Deserialize which causes a JsonException.
According to what I saw, the problem also exists in Get<T> and not only in the asynchronous version.
I added a null check and now it should work.