Merge #512

512: Bump libp2p from 0.37.1 to 0.38.0 r=thomaseizinger a=dependabot[bot]

Bumps [libp2p](https://github.com/libp2p/rust-libp2p) from 0.37.1 to 0.38.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/libp2p/rust-libp2p/releases">libp2p's releases</a>.</em></p>
<blockquote>
<h2>v0.38.0</h2>
<p>See individual <a href="https://github.com/libp2p/rust-libp2p/blob/HEAD/CHANGELOG.md">changelogs</a> for details.</p>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/libp2p/rust-libp2p/blob/master/CHANGELOG.md">libp2p's changelog</a>.</em></p>
<blockquote>
<h2>Version 0.38.0 [2021-05-17]</h2>
<ul>
<li>Update individual crates.
<ul>
<li><code>libp2p-core</code></li>
<li><code>libp2p-gossipsub</code></li>
<li><code>libp2p-noise</code></li>
<li><code>libp2p-pnet</code></li>
<li><code>libp2p-wasm-ext</code></li>
</ul>
</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="0b7ee3fa92"><code>0b7ee3f</code></a> *: Prepare v0.38.0 (<a href="https://github-redirect.dependabot.com/libp2p/rust-libp2p/issues/2072">#2072</a>)</li>
<li><a href="c5bcada2c2"><code>c5bcada</code></a> protocols/gossipsub: Rework connection keep-alive (<a href="https://github-redirect.dependabot.com/libp2p/rust-libp2p/issues/2043">#2043</a>)</li>
<li><a href="9c5dd84099"><code>9c5dd84</code></a> build(deps): Update snow requirement from 0.7.1 to 0.8.0 (<a href="https://github-redirect.dependabot.com/libp2p/rust-libp2p/issues/2068">#2068</a>)</li>
<li><a href="1fdac073fc"><code>1fdac07</code></a> build(deps): Bump actions-rs/toolchain from 1 to 1.0.7 (<a href="https://github-redirect.dependabot.com/libp2p/rust-libp2p/issues/2069">#2069</a>)</li>
<li><a href="10fcc1c485"><code>10fcc1c</code></a> build(deps): Bump actions-rs/cargo from 1 to 1.0.3 (<a href="https://github-redirect.dependabot.com/libp2p/rust-libp2p/issues/2070">#2070</a>)</li>
<li><a href="82c8b1a4b3"><code>82c8b1a</code></a> build(deps): Bump actions/checkout from 2 to 2.3.4 (<a href="https://github-redirect.dependabot.com/libp2p/rust-libp2p/issues/2071">#2071</a>)</li>
<li><a href="43a8ad8fc2"><code>43a8ad8</code></a> protocols/relay/examples: Add client server instructions (<a href="https://github-redirect.dependabot.com/libp2p/rust-libp2p/issues/2060">#2060</a>)</li>
<li><a href="8988ac247e"><code>8988ac2</code></a> protocols/mdns: Fix discovered event emission. (<a href="https://github-redirect.dependabot.com/libp2p/rust-libp2p/issues/2065">#2065</a>)</li>
<li><a href="5c541a16f1"><code>5c541a1</code></a> build(deps): update salsa20 requirement from 0.7 to 0.8 (<a href="https://github-redirect.dependabot.com/libp2p/rust-libp2p/issues/2062">#2062</a>)</li>
<li><a href="d931f36428"><code>d931f36</code></a> transport/wasm-ext: Support dialing <code>Multiaddr</code> with <code>/p2p</code> protocol (<a href="https://github-redirect.dependabot.com/libp2p/rust-libp2p/issues/2058">#2058</a>)</li>
<li>Additional commits viewable in <a href="https://github.com/libp2p/rust-libp2p/compare/v0.37.1...v0.38.0">compare view</a></li>
</ul>
</details>
<br />


[![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=libp2p&package-manager=cargo&previous-version=0.37.1&new-version=0.38.0)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`.

[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it
- `@dependabot merge` will merge this PR after your CI passes on it
- `@dependabot squash and merge` will squash and merge this PR after your CI passes on it
- `@dependabot cancel merge` will cancel a previously requested merge and block automerging
- `@dependabot reopen` will reopen this PR if it is closed
- `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
- `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
- `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)


</details>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

swap/Cargo.toml

@@ -29,7 +29,7 @@ ecdsa_fun = { git = "https://github.com/LLFourn/secp256kfun", features = [ "libs
 ed25519-dalek = "1"
 futures = { version = "0.3", default-features = false }
 itertools = "0.10"
-libp2p = { version = "0.37", default-features = false, features = [ "tcp-tokio", "yamux", "mplex", "dns-tokio", "noise", "request-response", "websocket" ] }
+libp2p = { version = "0.38", default-features = false, features = [ "tcp-tokio", "yamux", "mplex", "dns-tokio", "noise", "request-response", "websocket" ] }
 libp2p-async-await = { git = "https://github.com/comit-network/rust-libp2p-async-await" }
 miniscript = { version = "5", features = [ "serde" ] }
 monero = { version = "0.12", features = [ "serde_support" ] }