Throw errors when the response throws and error

[TimoGlastra]

Currently when a request fails it won't throw an error. This makes it hard to detect what went wrong (404, 500, etc...). I'd like to add some error handling decorators to the API: https://uplink.readthedocs.io/en/stable/user/quickstart.html#response-and-error-handling

[TimoGlastra]

I was wrong. Uplink does throw errors, ACA-Py doesn't throw an error when the schema is not found, but returns 200 with an empty schema object

[TimoGlastra]

See hyperledger/aries-cloudagent-python#1487