Auto merge of rust-lang#210 - rust-lang:dependabot/cargo/serde_json-1.0.66, r=JohnTitor

Bump serde_json from 1.0.64 to 1.0.66

Bumps [serde_json](https://github.com/serde-rs/json) from 1.0.64 to 1.0.66.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/serde-rs/json/releases">serde_json's releases</a>.</em></p>
<blockquote>
<h2>v1.0.66</h2>
<ul>
<li>Preserve exponent signifier and unary plus in exponent of arbitrary_precision numbers (<a href="https://github-redirect.dependabot.com/serde-rs/json/issues/786">#786</a>, thanks <a href="https://github.com/ruifengx"><code>`@​ruifengx</code></a>)</li>`
</ul>
<h2>v1.0.65</h2>
<ul>
<li>Documentation improvements</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/serde-rs/json/commit/6346bb30037f31ea69b9a4eb029875e23521681c"><code>6346bb3</code></a> Release 1.0.66</li>
<li><a href="https://github.com/serde-rs/json/commit/7780a670e7eb25ade19dbaf6d3babd7352b3e613"><code>7780a67</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/serde-rs/json/issues/789">#789</a> from serde-rs/orpattern</li>
<li><a href="https://github.com/serde-rs/json/commit/53e6ce4a677e34be3e60a277721c7e49a358fb3f"><code>53e6ce4</code></a> Restore compatiblity with older rustc after PR 786</li>
<li><a href="https://github.com/serde-rs/json/commit/c38fc6530b0acaf5af25f568a7c56b01713b937a"><code>c38fc65</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/serde-rs/json/issues/786">#786</a> from ruifengx/master</li>
<li><a href="https://github.com/serde-rs/json/commit/c9193d4ed91176898310b9eb0a6878621f1f7000"><code>c9193d4</code></a> Release 1.0.65</li>
<li><a href="https://github.com/serde-rs/json/commit/f20557691dbce8a4c8c4d1c15acb2a55e00139dc"><code>f205576</code></a> Merge pull request 788 from jplatte/doc-cfg</li>
<li><a href="https://github.com/serde-rs/json/commit/6f15a0e1b2a0ed23ffedf44c4d6a3b52f2727d8e"><code>6f15a0e</code></a> Add doc(cfg(feature = &quot;std&quot;)) attribute where appropriate</li>
<li><a href="https://github.com/serde-rs/json/commit/d8f70a386167c3d1f3150b66de58a82f874d0a2b"><code>d8f70a3</code></a> Add CI job to ensure documentation can be built</li>
<li><a href="https://github.com/serde-rs/json/commit/e2978b6a774c2aef2c5fbf0a38a96e88dff64eff"><code>e2978b6</code></a> Document unbounded_depth, raw_value feature-gated API via doc_cfg</li>
<li><a href="https://github.com/serde-rs/json/commit/21523246e529ae02cbecb8ab64e869a46e8ee69a"><code>2152324</code></a> Make arbitrary_precision preserve the exact string representation</li>
<li>Additional commits viewable in <a href="https://github.com/serde-rs/json/compare/v1.0.64...v1.0.66">compare view</a></li>
</ul>
</details>
<br />

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</details>

Author: bors

Cargo.lock

@@ -19,7 +19,7 @@ anyhow = "1.0.42"
 log = "0.4"
 semver = "0.10" # Keep in sync with version pulled by Cargo
 serde = { version = "1.0.127", features = ["derive"] }
-serde_json = "1.0.64"
+serde_json = "1.0.66"
 
 [dev-dependencies]
 quickcheck = "1.0"