Auto merge of #7847 - rust-lang:dependabot/cargo/pretty_env_logger-0.4, r=alexcrichton

Update pretty_env_logger requirement from 0.3 to 0.4

Updates the requirements on [pretty_env_logger](https://github.com/seanmonstar/pretty-env-logger) to permit the latest version.
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/seanmonstar/pretty-env-logger/commit/fa4e28537f153a20e655349556ec982e3657a848"><code>fa4e285</code></a> v0.4.0</li>
<li><a href="https://github.com/seanmonstar/pretty-env-logger/commit/693b5e70880ada9fcca6c10766f5c55f656980e8"><code>693b5e7</code></a> Remove chrono dependency</li>
<li><a href="https://github.com/seanmonstar/pretty-env-logger/commit/28c5ad0cbbc206b661f1e35784fc2a2d2d11a9ed"><code>28c5ad0</code></a> env_logger: 0.6.2 -&gt; 0.7.0</li>
<li><a href="https://github.com/seanmonstar/pretty-env-logger/commit/0288e4ed4b730239c401b46b78b818fa3875171b"><code>0288e4e</code></a> fixes env goof in README.md</li>
<li><a href="https://github.com/seanmonstar/pretty-env-logger/commit/76d9fc760608eff42bbf7deb77ad2cab2cd1172e"><code>76d9fc7</code></a> Make env_logger dependency public</li>
<li><a href="https://github.com/seanmonstar/pretty-env-logger/commit/8ddffae2c556108640af9d4faf95d51f773f2623"><code>8ddffae</code></a> v0.3.1</li>
<li><a href="https://github.com/seanmonstar/pretty-env-logger/commit/04c1aa50e1f07fa2be33ea6866c05e39a073f015"><code>04c1aa5</code></a> require latest env_logger</li>
<li><a href="https://github.com/seanmonstar/pretty-env-logger/commit/ce8c2f12fb72f634f8467f2e5e4fc4a19edafa7c"><code>ce8c2f1</code></a> fix deprecated calls</li>
<li><a href="https://github.com/seanmonstar/pretty-env-logger/commit/67d2e7d68b3449229c4876bb0813bed50d65b207"><code>67d2e7d</code></a> timestamps with milliseconds</li>
<li><a href="https://github.com/seanmonstar/pretty-env-logger/commit/27eaa2bc1bb666b0888027c106d00cc0ab50d2bc"><code>27eaa2b</code></a> fix with_builder_1 example (<a href="https://github-redirect.dependabot.com/seanmonstar/pretty-env-logger/issues/25">#25</a>)</li>
<li>See full diff in <a href="https://github.com/seanmonstar/pretty-env-logger/compare/v0.3.0...v0.4.0">compare view</a></li>
</ul>
</details>
<br />

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)
- `@dependabot use these labels` will set the current labels as the default for future PRs for this repo and language
- `@dependabot use these reviewers` will set the current reviewers as the default for future PRs for this repo and language
- `@dependabot use these assignees` will set the current assignees as the default for future PRs for this repo and language
- `@dependabot use this milestone` will set the current milestone as the default for future PRs for this repo and language
- `@dependabot badge me` will comment on this PR with code to add a "Dependabot enabled" badge to your readme

Additionally, you can set the following in your Dependabot [dashboard](https://app.dependabot.com):
- Update frequency (including time of day and day of week)
- Pull request limits (per update run and/or open at any time)
- Automerge options (never/patch/minor, and dev/runtime dependencies)
- Out-of-range updates (receive only lockfile updates, if desired)
- Security updates (receive only security updates, if desired)

</details>

Author: bors

Cargo.toml

@@ -28,7 +28,7 @@ crypto-hash = "0.3.1"
 curl = { version = "0.4.23", features = ["http2"] }
 curl-sys = "0.4.22"
 env_logger = "0.7.0"
-pretty_env_logger = { version = "0.3", optional = true }
+pretty_env_logger = { version = "0.4", optional = true }
 anyhow = "1.0"
 filetime = "0.2"
 flate2 = { version = "1.0.3", features = ["zlib"] }