Update libp2p requirement from 0.37 to 0.38

[dependabot[bot]]

Updates the requirements on libp2p to permit the latest version.

Release notes

Sourced from libp2p's releases.

v0.38.0

See individual changelogs for details.

Changelog

Sourced from libp2p's changelog.

Version 0.38.0 [2021-05-17]

• Update individual crates.
  • libp2p-core
  • libp2p-gossipsub
  • libp2p-noise
  • libp2p-pnet
  • libp2p-wasm-ext

Version 0.37.1 [2021-04-14]

• Update individual crates.
  • libp2p-swarm-derive

Version 0.37.0 [2021-04-13]

• Update individual crates.

  • libp2p-core
  • libp2p-dns
  • libp2p-floodsub
  • libp2p-gossipsub
  • libp2p-kad
  • libp2p-mdns
  • libp2p-ping
  • libp2p-relay
  • libp2p-request-response
  • libp2p-swarm
  • libp2p-wasm-ext
  • libp2p-yamux

• Drop support for wasm32-unknown-unknown in favor of wasm32-unknown-emscripten and wasm32-wasi PR 2038.

Version 0.36.0 [2021-03-17]

• Consolidate top-level utility functions for constructing development transports. There is now just development_transport() (available with default features) and tokio_development_transport() (available when the corresponding tokio features are enabled). Furthermore, these are now async fns. The minor variations that also included pnet support have been removed. PR 1927

• Update libp2p crates.

• Do not leak default features from libp2p crates. PR 1986.

• Add libp2p-relay to libp2p facade crate.

... (truncated)

Commits

• 0b7ee3f *: Prepare v0.38.0 (#2072)
• c5bcada protocols/gossipsub: Rework connection keep-alive (#2043)
• 9c5dd84 build(deps): Update snow requirement from 0.7.1 to 0.8.0 (#2068)
• 1fdac07 build(deps): Bump actions-rs/toolchain from 1 to 1.0.7 (#2069)
• 10fcc1c build(deps): Bump actions-rs/cargo from 1 to 1.0.3 (#2070)
• 82c8b1a build(deps): Bump actions/checkout from 2 to 2.3.4 (#2071)
• 43a8ad8 protocols/relay/examples: Add client server instructions (#2060)
• 8988ac2 protocols/mdns: Fix discovered event emission. (#2065)
• 5c541a1 build(deps): update salsa20 requirement from 0.7 to 0.8 (#2062)
• d931f36 transport/wasm-ext: Support dialing Multiaddr with /p2p protocol (#2058)
• Additional commits viewable in compare view

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[codecov[bot]]

Codecov Report

Merging #25 (11ff2c7) into master (005e6c1) will increase coverage by 0.01%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #25      +/-   ##
==========================================
+ Coverage   48.74%   48.75%   +0.01%     
==========================================
  Files          82       82              
  Lines        9738     9738              
==========================================
+ Hits         4747     4748       +1     
+ Misses       4991     4990       -1     

Impacted Files	Coverage Δ
simag_core/src/agent/lang/common.rs	73.00% <0.00%> (+0.30%)	:arrow_up:

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