Bumps the dependencies group with 4 updates:
[num-traits](https://github.com/rust-num/num-traits),
[proc-macro2](https://github.com/dtolnay/proc-macro2),
[syn](https://github.com/dtolnay/syn) and
[similar](https://github.com/mitsuhiko/similar).
Updates `num-traits` from 0.2.16 to 0.2.17
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/rust-num/num-traits/blob/master/RELEASES.md">num-traits's
changelog</a>.</em></p>
<blockquote>
<h1>Release 0.2.17 (2023-10-07)</h1>
<ul>
<li><a
href="https://redirect.github.com/rust-num/num-traits/pull/286">Fix a
doc warning about custom classes with newer rustdoc.</a></li>
</ul>
<p><strong>Contributors</strong>: <a
href="https://github.com/robamu"><code>@robamu</code></a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="0a27d8c95a"><code>0a27d8c</code></a>
Merge <a
href="https://redirect.github.com/rust-num/num-traits/issues/289">#289</a></li>
<li><a
href="34e309a918"><code>34e309a</code></a>
Release 0.2.17</li>
<li><a
href="ef36d69f7c"><code>ef36d69</code></a>
Merge <a
href="https://redirect.github.com/rust-num/num-traits/issues/286">#286</a></li>
<li><a
href="d9d94f8a51"><code>d9d94f8</code></a>
Bugfix for text codeblock in documentation.</li>
<li>See full diff in <a
href="https://github.com/rust-num/num-traits/compare/num-traits-0.2.16...num-traits-0.2.17">compare
view</a></li>
</ul>
</details>
<br />
Updates `proc-macro2` from 1.0.67 to 1.0.69
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/dtolnay/proc-macro2/releases">proc-macro2's
releases</a>.</em></p>
<blockquote>
<h2>1.0.69</h2>
<ul>
<li>Fix Span::source_text() bug causing panics or incorrect source text
(<a
href="https://redirect.github.com/dtolnay/proc-macro2/issues/410">#410</a>)</li>
</ul>
<h2>1.0.68</h2>
<ul>
<li>Fix panic in Span::source_text() when source contains multibyte
characters (<a
href="https://redirect.github.com/dtolnay/proc-macro2/issues/408">#408</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="937bbcdcc1"><code>937bbcd</code></a>
Release 1.0.69</li>
<li><a
href="42dc36efce"><code>42dc36e</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/proc-macro2/issues/412">#412</a>
from dtolnay/sourcetext</li>
<li><a
href="6461c2dd60"><code>6461c2d</code></a>
Add out-of-order call to source_text test</li>
<li><a
href="c4c3251c57"><code>c4c3251</code></a>
Explain source_text implementation approach</li>
<li><a
href="31b14c30f2"><code>31b14c3</code></a>
Cache byte offsets computed from a char index</li>
<li><a
href="0e154618a1"><code>0e15461</code></a>
Make FileInfo mut in source_text to allow amortization of char
indices</li>
<li><a
href="90b8e1eb01"><code>90b8e1e</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/proc-macro2/issues/411">#411</a>
from dtolnay/sourcetext</li>
<li><a
href="137ae0a341"><code>137ae0a</code></a>
Fix source_text treating span.lo as byte offset not char index</li>
<li><a
href="4c0bd28a61"><code>4c0bd28</code></a>
Add regression test for issue 410</li>
<li><a
href="12eddc03a4"><code>12eddc0</code></a>
Reword explanation of SourceMap initial value</li>
<li>Additional commits viewable in <a
href="https://github.com/dtolnay/proc-macro2/compare/1.0.67...1.0.69">compare
view</a></li>
</ul>
</details>
<br />
Updates `syn` from 2.0.37 to 2.0.38
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/dtolnay/syn/releases">syn's
releases</a>.</em></p>
<blockquote>
<h2>2.0.38</h2>
<ul>
<li>Fix <em>"method 'peek' has an incompatible type for
trait"</em> error when defining <code>bool</code> as a custom
keyword (<a
href="https://redirect.github.com/dtolnay/syn/issues/1518">#1518</a>,
thanks <a
href="https://github.com/Vanille-N"><code>@Vanille-N</code></a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="43632bfb6c"><code>43632bf</code></a>
Release 2.0.38</li>
<li><a
href="abd2c214b4"><code>abd2c21</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/syn/issues/1518">#1518</a>
from Vanille-N/master</li>
<li><a
href="6701e6077e"><code>6701e60</code></a>
Absolute path to <code>bool</code> in
<code>custom_punctuation.rs</code></li>
<li><a
href="7313d24239"><code>7313d24</code></a>
Resolve single_match_else pedantic clippy lint in code generator</li>
<li><a
href="67ab64f3c0"><code>67ab64f</code></a>
Include unexpected token in the test failure message</li>
<li><a
href="137ae33486"><code>137ae33</code></a>
Check no remaining token after the first literal</li>
<li><a
href="258e9e8a11"><code>258e9e8</code></a>
Ignore single_match_else pedantic clippy lint in test</li>
<li><a
href="92fd50ee8c"><code>92fd50e</code></a>
Test docs.rs documentation build in CI</li>
<li>See full diff in <a
href="https://github.com/dtolnay/syn/compare/2.0.37...2.0.38">compare
view</a></li>
</ul>
</details>
<br />
Updates `similar` from 2.2.1 to 2.3.0
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/mitsuhiko/similar/blob/main/CHANGELOG.md">similar's
changelog</a>.</em></p>
<blockquote>
<h2>2.3.0</h2>
<ul>
<li>Added support for <code>Change::value_ref</code> and
<code>Change::value_mut</code>.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="47f46257d4"><code>47f4625</code></a>
2.3.0</li>
<li><a
href="3319f77693"><code>3319f77</code></a>
Downgrade msrv lock file</li>
<li><a
href="d21e126057"><code>d21e126</code></a>
Use Cargo.lock.msrv</li>
<li><a
href="86f68a6394"><code>86f68a6</code></a>
Make clippy happy</li>
<li><a
href="e85ddb0d18"><code>e85ddb0</code></a>
Added value_ref and value_mut</li>
<li><a
href="de455873da"><code>de45587</code></a>
Spelling and grammar fixes (<a
href="https://redirect.github.com/mitsuhiko/similar/issues/49">#49</a>)</li>
<li><a
href="9f76d88c3d"><code>9f76d88</code></a>
fix some english things (<a
href="https://redirect.github.com/mitsuhiko/similar/issues/48">#48</a>)</li>
<li><a
href="e575b88ca1"><code>e575b88</code></a>
Update GitHub Actions CI (<a
href="https://redirect.github.com/mitsuhiko/similar/issues/47">#47</a>)</li>
<li><a
href="ae815d13ea"><code>ae815d1</code></a>
Remove mention of Hunt–McIlroy / Hunt–Szymanski</li>
<li>See full diff in <a
href="https://github.com/mitsuhiko/similar/compare/2.2.1...2.3.0">compare
view</a></li>
</ul>
</details>
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closes#273closes#814
HIR is removed from this PR, with the minifier being commented out.
HIR is a wonderful idea for compiling to lower languages, but after
sitting on it for a few months I found that it only adds confusion and
uncertainties to both myself and future contributors.
It also adds too much burden to maintainers if we plan to support more
downstream tools.
1 AST is the only way.
Fold constant addition expressions. Handles string concatenation and
addition, both with implicit casting.
For example,
```ts
let x = 1 + 1
let y = "hello " + "world"
```
now becomes
```ts
let x = 2
let y = "hello world"
```
## Extra Goodies
- test(minifier): add `test_snapshot` helper to perform snapshot tests
with `insta`
- up(hir): implement `std::ops::Add` for `NumericValue`
- up(span): impl `TryFrom<Cow<'_, &str>>` for `Atom`
