Fix etcd exponential backoff retry bug (left shift by -1 )
Bump boost from 1.75.0 to 1.78.0
Bump openssl from 1.1.1l to 1.1.1m
Bump nats.c from 2.5.0 to 3.3.0
Bump grpc from 1.37.0 to 1.44.0
Bump protobuf 3.15.5 to 3.19.2
Move cpprestsdk into conan instead of hardcoded into the repo (fixes compilation with XCode 13.1)
Move grpc into conan instead of hardcoded into the repo
Update docker image to use CLang 13 instead of 11
Bump c++ spec from 11 to 17
Compile new protos with updated protoc