- fixes https://github.com/vacp2p/nim-libp2p/issues/1194.
- fixes ambiguous `KeyError`
- removes an unnecessary type param for `newSeqWith`
- fixes tests for `safeConvert`
The main fixes relate to Nim 2.2 being more strict and not accepting
calls with a wrong number of type parameters.
diegomrsantos
Ludovic Chenut
Tanguy