* Refactor sc-network/service metrics.
1. Aggregate sc-network metrics into a submodule, introducing
two more sourced metrics to avoid duplicate atomics.
2. Decouple periodic sc-service network metrics from other
metrics, so that they can be updated independently.
* Update client/service/src/metrics.rs
* Update client/service/src/metrics.rs
* Update to libp2p-0.23.
Thereby incorporate bandwidth measurement along the
lines previously done by libp2p itself.
* Tweak dependencies for wasm32 compilation.
For wasm32 we need to enable unstable features to
make `task::Builder::local` available.
* Simplify dependencies.
* Simplify.
Leave the calculation of bytes sent/received per second
to the outer layers of the code, subject to their own
individual update intervals.
* Cleanup
* Re-add lost dev dependency.
* Avoid division by zero.
* Remove redundant metric.
* Enable sending of noise legacy handshakes.
* Add comment about monotonic gauge.
* CI
Roman Borschel