Auto merge of #28503 - servo:dependabot/cargo/backtrace-0.3.56, r=jdm

Bump backtrace from 0.3.54 to 0.3.56

Bumps [backtrace](https://github.com/rust-lang/backtrace-rs) from 0.3.54 to 0.3.56.
<details>
<summary>Commits</summary>
<ul>
<li><a href="710fc18ddc"><code>710fc18</code></a> Bump to 0.3.56 (<a href="https://github-redirect.dependabot.com/rust-lang/backtrace-rs/issues/406">#406</a>)</li>
<li><a href="52ce0f52b2"><code>52ce0f5</code></a> Bump msrv</li>
<li><a href="c27d7c5af2"><code>c27d7c5</code></a> Update <code>object</code> crate dependency</li>
<li><a href="6f4992c62e"><code>6f4992c</code></a> gimli: Enable backtrace for FreeBSD (<a href="https://github-redirect.dependabot.com/rust-lang/backtrace-rs/issues/402">#402</a>)</li>
<li><a href="9f24a93ac3"><code>9f24a93</code></a> Use the symbol table if the DWARF only has line numbers (<a href="https://github-redirect.dependabot.com/rust-lang/backtrace-rs/issues/401">#401</a>)</li>
<li><a href="47069af003"><code>47069af</code></a> disable dl_iterate_phdr for uclibc (<a href="https://github-redirect.dependabot.com/rust-lang/backtrace-rs/issues/396">#396</a>)</li>
<li><a href="bcf088e462"><code>bcf088e</code></a> Fix another unused imports warning</li>
<li><a href="489af067cc"><code>489af06</code></a> Update some links (<a href="https://github-redirect.dependabot.com/rust-lang/backtrace-rs/issues/395">#395</a>)</li>
<li><a href="af078ecc0b"><code>af078ec</code></a> Deny warnings on CI to keep codebase warning-free  (<a href="https://github-redirect.dependabot.com/rust-lang/backtrace-rs/issues/394">#394</a>)</li>
<li><a href="e7cbd9bf39"><code>e7cbd9b</code></a> Bump to 0.3.55</li>
<li>Additional commits viewable in <a href="https://github.com/rust-lang/backtrace-rs/compare/0.3.54...0.3.56">compare view</a></li>
</ul>
</details>
<br />

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Cargo.lock

@@ -253,9 +253,9 @@ dependencies = [
 
 [[package]]
 name = "backtrace"
-version = "0.3.54"
+version = "0.3.56"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2baad346b2d4e94a24347adeee9c7a93f412ee94b9cc26e5b59dea23848e9f28"
+checksum = "9d117600f438b1707d4e4ae15d3595657288f8235a0eb593e80ecc98ab34e1bc"
 dependencies = [
  "addr2line",
  "cfg-if 1.0.0",
@@ -4312,9 +4312,9 @@ dependencies = [
 
 [[package]]
 name = "object"
-version = "0.22.0"
+version = "0.23.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8d3b63360ec3cb337817c2dbd47ab4a0f170d285d8e5a2064600f3def1402397"
+checksum = "a9a7ab5d64814df0fe4a4b5ead45ed6c5f181ee3ff04ba344313a6c80446c5d4"
 
 [[package]]
 name = "once_cell"