feat: expose prometheus metrics #22
Merged
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Based on this: https://github.com/libp2p/rust-libp2p/blob/master/examples/metrics/src/main.rs
I had a bunch of random issues about type safety, which were resolved when I bumped all libp2p deps to the latest versions. In the process, I had to upgrade cargo as well due to: rust-lang/rust#137383