deps: bump the dependency-updates group with 2 updates (#909)

Bumps the dependency-updates group with 2 updates:
[datatables.net-buttons](https://github.com/DataTables/Dist-DataTables-Buttons)
and
[datatables.net-buttons-bs4](https://github.com/DataTables/Dist-DataTables-Buttons-Bootstrap4).

Updates `datatables.net-buttons` from 3.1.2 to 3.2.0
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/DataTables/Dist-DataTables-Buttons/releases">datatables.net-buttons's
releases</a>.</em></p>
<blockquote>
<h2>3.2.0</h2>
<p>Buttons 3.2.0</p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/DataTables/Dist-DataTables-Buttons/commit/9eb884c02fc1e2aa552e0aeec9ac943552fc0b97"><code>9eb884c</code></a>
Sync tag release - 3.2.0</li>
<li><a
href="https://github.com/DataTables/Dist-DataTables-Buttons/commit/d9c1c65218e1d78fe94472a7adbc4b988a65ff45"><code>d9c1c65</code></a>
24a3dd12626c70152100444eebb1c5ab3be6c7fe Release 3.2.0</li>
<li><a
href="https://github.com/DataTables/Dist-DataTables-Buttons/commit/a8ca3e615b9621417d1b4dbe1f5cab75574ef0f4"><code>a8ca3e6</code></a>
91ec1694df383e3520038c0ecab83ee04b93b829 New: When closing a popover,
trigger...</li>
<li><a
href="https://github.com/DataTables/Dist-DataTables-Buttons/commit/cdb39d478bc176a51e17153d4fe1bb2832a6b7d8"><code>cdb39d4</code></a>
3cab48583da254adb44e6c00b7bcd13023563712 New: Add
<code>escapeExcelFormula</code> to `-a...</li>
<li><a
href="https://github.com/DataTables/Dist-DataTables-Buttons/commit/21388133f52b67e45a10f5ecae0c615b3c9eee71"><code>2138813</code></a>
fe105bc93f50921112e4f66a698b3312395c9a6a Fix: If a popover is
<code>fixed</code> positio...</li>
<li><a
href="https://github.com/DataTables/Dist-DataTables-Buttons/commit/fd958fe653e8f710c9f761cad0444104d4dc762a"><code>fd958fe</code></a>
8ab9e3841286f90654d29150a6f28c7b286f5eb1 Docs: Popover description was
missin...</li>
<li><a
href="https://github.com/DataTables/Dist-DataTables-Buttons/commit/64cc80d5a044afce6521e15e75ae2275bb4d4eac"><code>64cc80d</code></a>
b10b3c5ba5e670f0283779d74ec532561eab1c6f Dev: Finish removing styling
example...</li>
<li><a
href="https://github.com/DataTables/Dist-DataTables-Buttons/commit/a3d4fb8011bcb0f890d8e1e68043965e662bec23"><code>a3d4fb8</code></a>
002b66e9e24af5c176af543ac8757d2f957ba7f0 New: `-init
buttons.buttons.dropIcon...</li>
<li><a
href="https://github.com/DataTables/Dist-DataTables-Buttons/commit/26b37b0318d2465d3e2624de2347d0a371e9835a"><code>26b37b0</code></a>
7099db386b1f372bd2fc6db24739dcf34ec9f802 WIP: Improvements to dropdown
icon t...</li>
<li><a
href="https://github.com/DataTables/Dist-DataTables-Buttons/commit/4f4e6585785d662a8671cc4e910d83d4e97cc260"><code>4f4e658</code></a>
927745f3bd0ed891a69e8c006d0de368bf115a85 New: Buttons with a split can
now be...</li>
<li>Additional commits viewable in <a
href="https://github.com/DataTables/Dist-DataTables-Buttons/compare/3.1.2...3.2.0">compare
view</a></li>
</ul>
</details>
<br />

Updates `datatables.net-buttons-bs4` from 3.1.2 to 3.2.0
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/DataTables/Dist-DataTables-Buttons-Bootstrap4/releases">datatables.net-buttons-bs4's
releases</a>.</em></p>
<blockquote>
<h2>3.2.0</h2>
<p>Buttons Bootstrap4 3.2.0</p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/DataTables/Dist-DataTables-Buttons-Bootstrap4/commit/c9cd0d85728c0675d22b571dd604abe66e522f36"><code>c9cd0d8</code></a>
91ec1694df383e3520038c0ecab83ee04b93b829 New: When closing a popover,
trigger...</li>
<li><a
href="https://github.com/DataTables/Dist-DataTables-Buttons-Bootstrap4/commit/457ce3a540027a3f4dd26330bc1a9275f3f93716"><code>457ce3a</code></a>
3cab48583da254adb44e6c00b7bcd13023563712 New: Add
<code>escapeExcelFormula</code> to `-a...</li>
<li><a
href="https://github.com/DataTables/Dist-DataTables-Buttons-Bootstrap4/commit/650ca200c4e56bef842a289bc50d3f5fe8533eae"><code>650ca20</code></a>
fe105bc93f50921112e4f66a698b3312395c9a6a Fix: If a popover is
<code>fixed</code> positio...</li>
<li><a
href="https://github.com/DataTables/Dist-DataTables-Buttons-Bootstrap4/commit/b5fb62d0c4a3266af3fd201a6fec859305ac3ab1"><code>b5fb62d</code></a>
8ab9e3841286f90654d29150a6f28c7b286f5eb1 Docs: Popover description was
missin...</li>
<li><a
href="https://github.com/DataTables/Dist-DataTables-Buttons-Bootstrap4/commit/395e148feef9cde270bc2d18002ce20a1b9dab5d"><code>395e148</code></a>
b10b3c5ba5e670f0283779d74ec532561eab1c6f Dev: Finish removing styling
example...</li>
<li><a
href="https://github.com/DataTables/Dist-DataTables-Buttons-Bootstrap4/commit/4df26f596e197358c272bdd4030508c47df0cecc"><code>4df26f5</code></a>
002b66e9e24af5c176af543ac8757d2f957ba7f0 New: `-init
buttons.buttons.dropIcon...</li>
<li><a
href="https://github.com/DataTables/Dist-DataTables-Buttons-Bootstrap4/commit/6cd24dc503f6db33aa707b9518443b2efe77a54f"><code>6cd24dc</code></a>
7099db386b1f372bd2fc6db24739dcf34ec9f802 WIP: Improvements to dropdown
icon t...</li>
<li><a
href="https://github.com/DataTables/Dist-DataTables-Buttons-Bootstrap4/commit/f13f54b6ae3d7bd438466364e27caa3cc5b07202"><code>f13f54b</code></a>
927745f3bd0ed891a69e8c006d0de368bf115a85 New: Buttons with a split can
now be...</li>
<li><a
href="https://github.com/DataTables/Dist-DataTables-Buttons-Bootstrap4/commit/362e6951736880085da39fe19e90557df3bc606b"><code>362e695</code></a>
822bb21ef766a967c1d99819d00aa273d2001b30 Dev: Tweak previous fix - it
was cau...</li>
<li><a
href="https://github.com/DataTables/Dist-DataTables-Buttons-Bootstrap4/commit/672b73a02e5cc1ae13661aaaebc5ee22ec00c65a"><code>672b73a</code></a>
3583195f85049bbf3dde8d15b3768617bc8183af Fix: An error would occur if an
expo...</li>
<li>Additional commits viewable in <a
href="https://github.com/DataTables/Dist-DataTables-Buttons-Bootstrap4/compare/3.1.2...3.2.0">compare
view</a></li>
</ul>
</details>
<br />


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