Bump postcss from 8.4.39 to 8.4.49#6

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.39 to 8.4.49. <details> <summary>Release notes</summary> <p><em>Sourced from <a href="https://github.com/postcss/postcss/releases">postcss's releases</a>.</em></p> <blockquote> <h2>8.4.49</h2> <ul> <li>Fixed custom syntax without <code>source.offset</code> (by <a href="https://github.com/romainmenke"><code>@​romainmenke</code></a>).</li> </ul> <h2>8.4.48</h2> <ul> <li>Fixed position calculation in error/warnings methods (by <a href="https://github.com/romainmenke"><code>@​romainmenke</code></a>).</li> </ul> <h2>8.4.47</h2> <ul> <li>Removed debug code.</li> </ul> <h2>8.4.46</h2> <ul> <li>Fixed <code>Cannot read properties of undefined (reading 'before')</code>.</li> </ul> <h2>8.4.45</h2> <ul> <li>Removed unnecessary fix which could lead to infinite loop.</li> </ul> <h2>8.4.44</h2> <ul> <li>Another way to fix <code>markClean is not a function</code> error.</li> </ul> <h2>8.4.43</h2> <ul> <li>Fixed <code>markClean is not a function</code> error.</li> </ul> <h2>8.4.42</h2> <ul> <li>Fixed CSS syntax error on long minified files (by <a href="https://github.com/varpstar"><code>@​varpstar</code></a>).</li> </ul> <h2>8.4.41</h2> <ul> <li>Fixed types (by <a href="https://github.com/nex3"><code>@​nex3</code></a> and <a href="https://github.com/querkmachine"><code>@​querkmachine</code></a>).</li> <li>Cleaned up RegExps (by <a href="https://github.com/bluwy"><code>@​bluwy</code></a>).</li> </ul> <h2>8.4.40</h2> <ul> <li>Moved to getter/setter in nodes types to help Sass team (by <a href="https://github.com/nex3"><code>@​nex3</code></a>).</li> </ul> </blockquote> </details> <details> <summary>Changelog</summary> <p><em>Sourced from <a href="https://github.com/postcss/postcss/blob/main/CHANGELOG.md">postcss's changelog</a>.</em></p> <blockquote> <h2>8.4.49</h2> <ul> <li>Fixed custom syntax without <code>source.offset</code> (by <a href="https://github.com/romainmenke"><code>@​romainmenke</code></a>).</li> </ul> <h2>8.4.48</h2> <ul> <li>Fixed position calculation in error/warnings methods (by <a href="https://github.com/romainmenke"><code>@​romainmenke</code></a>).</li> </ul> <h2>8.4.47</h2> <ul> <li>Removed debug code.</li> </ul> <h2>8.4.46</h2> <ul> <li>Fixed <code>Cannot read properties of undefined (reading 'before')</code>.</li> </ul> <h2>8.4.45</h2> <ul> <li>Removed unnecessary fix which could lead to infinite loop.</li> </ul> <h2>8.4.44</h2> <ul> <li>Another way to fix <code>markClean is not a function</code> error.</li> </ul> <h2>8.4.43</h2> <ul> <li>Fixed <code>markClean is not a function</code> error.</li> </ul> <h2>8.4.42</h2> <ul> <li>Fixed CSS syntax error on long minified files (by <a href="https://github.com/varpstar"><code>@​varpstar</code></a>).</li> </ul> <h2>8.4.41</h2> <ul> <li>Fixed types (by <a href="https://github.com/nex3"><code>@​nex3</code></a> and <a href="https://github.com/querkmachine"><code>@​querkmachine</code></a>).</li> <li>Cleaned up RegExps (by <a href="https://github.com/bluwy"><code>@​bluwy</code></a>).</li> </ul> <h2>8.4.40</h2> <ul> <li>Moved to getter/setter in nodes types to help Sass team (by <a href="https://github.com/nex3"><code>@​nex3</code></a>).</li> </ul> </blockquote> </details> <details> <summary>Commits</summary> <ul> <li><a href="https://github.com/postcss/postcss/commit/aed8b899884db4bc89f60782771eecd8c7861b32"><code>aed8b89</code></a> Release 8.4.49 version</li> <li><a href="https://github.com/postcss/postcss/commit/345063010bf5a9724589a9ee420bd511ec2b12bf"><code>3450630</code></a> Fix position calculations when offset is missing (<a href="https://redirect.github.com/postcss/postcss/issues/1983">#1983</a>)</li> <li><a href="https://github.com/postcss/postcss/commit/77420d62919b4d53921a113bbc939ad5e5b49fe6"><code>77420d6</code></a> Release 8.4.48 version</li> <li><a href="https://github.com/postcss/postcss/commit/341529ff4e78d7b90526e6e2eb178573192b47e3"><code>341529f</code></a> Update dependencies</li> <li><a href="https://github.com/postcss/postcss/commit/66fa667831bae59696d0b9ba54c2ee5b9dd74b6a"><code>66fa667</code></a> Add Node.js 23 to CI</li> <li><a href="https://github.com/postcss/postcss/commit/1a8b261404348c7ba495af0707d6d244d66cf566"><code>1a8b261</code></a> fix inconsistent position calculations (<a href="https://redirect.github.com/postcss/postcss/issues/1980">#1980</a>)</li> <li><a href="https://github.com/postcss/postcss/commit/1cc6ac3bf43a12460d3396e2cb76f14075daea1b"><code>1cc6ac3</code></a> Clarify usage in docs</li> <li><a href="https://github.com/postcss/postcss/commit/5e6fd1302d2cc9a844ac99282b2b7745e4ac0ed3"><code>5e6fd13</code></a> Release 8.4.47 version</li> <li><a href="https://github.com/postcss/postcss/commit/714bc10258bfa96be26bc201d218c67df09da82c"><code>714bc10</code></a> Typo</li> <li><a href="https://github.com/postcss/postcss/commit/439d20e651098d9d16d31ede62df6f7916925e91"><code>439d20e</code></a> Release 8.4.46 version</li> <li>Additional commits viewable in 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