fix(cache): better interfacing and include params in key

Closes #248

[x] Finally fix caching by using both query and all options (query params) as primary key in cache (#248)
[x] Switch to using stdlib JSON instead of 3rd party CBOR for cache
[x] Removed hashed bool value, since it won't be used
[x] Make an abstraction for results over the database drivers, making it easier and safer to use
[x] Added config option to set a key prefix, default is HEARCHCO_
[x] Changed default cache to none (disabled)

hearchco / agent