* feat: add uPnP nat manager
Adds a really basic nat manager that attempts to use UPnP to punch
a hole through your router for any IPV4 tcp addresses you have
configured.
Adds any configured addresses to the node's observed addresses list
and adds observed addresses to `libp2p.multiaddrs` so we exchange
them with peers when performing `identify` and people can dial you.
Adds configuration options under `config.nat`
Hole punching is async to not affect start up time.
Co-authored-by: Vasco Santos <vasco.santos@moxy.studio>
* fix: store provider multiaddrs during find providers
Changes the behaviour of `libp2p.contentRouting.findProviders` to store
the multiaddrs reported by the routers before yielding results to
the caller, so when they try to dial the provider, the multiaddrs are
already in the peer store's address book.
Also dedupes providers reported by routers but keeps all of the addresses
reported, even for duplicates.
Also, also fixes a performance bug where the previous implementation would
wait for any router to completely finish finding providers before sending
any results to the caller. It'll now yield results as they come in which
makes it much, much faster.
* chore: auto relay example
* chore: update examples to use process arguments
* chore: add test setup for node tests and test for auto-relay
* chore: apply suggestions from code review
* chore: do not use promise for multiaddrs event on example
BREAKING CHANGE: pubsub signing policy properties were changed according to libp2p-interfaces changes to a single property. The emitSelf option default value was also modified to match the routers value
