- Rework to have exception raise only at rlp decoding and use
result types from then onwards
- Adjust the current API to have result versions and deprecated
the ones which had var Record + bool
- Add PublickKey to the Record object, as this allows us to skip
fromRaw calls whenever access is needed to the public key
- Add a TypedRecord.fromRecord which cannot fail and deprecate
the old one
- Some other minor clean-up & re-ordering
Fixes a missing CancelledError async raising on discv5 waitMessage
which would cause "Error set on a non-raising future".
Also moves some more results import away from stew.
Kim De Mey