Bump soupsieve from 2.8.4 to 2.9

[dependabot]

Bumps soupsieve from 2.8.4 to 2.9.

Release notes

Sourced from soupsieve's releases.

2.9

• NEW: Drop Python 3.9 support.
• NEW: Lazy compile selector patterns to improve initial import speed.
• FIX: Correct :nth-child/:nth-of-type (and -last- variants) for An+B values whose sequence steps onto index 0 or onto the last child (e.g. :nth-child(2n-2), :nth-child(n-1), :nth-child(n+5)), which previously matched the wrong elements or nothing at all (@​gaoflow).
• FIX: More efficient CSS ID matching (@​kaimandalic).
• FIX: Fix inefficient trimming of comments and white space (@​kaimandalic).

Commits

• 8763f91 Format changelog message
• cf198fc Fix inefficient trimming of comments and white space
• ce44e49 Merge commit from fork
• 751c57b Fix :nth-child/:nth-of-type matching for An+B index boundaries (#297)
• 08e9ede Drop Python 3.9
• d6e6830 Rework selector mapping
• d2d1581 Utilize property for accessing lazy regular expression pattern
• b8701de Build patterns and regexes lazily in css_parser (#296)
• See full diff in compare view

[quis]

Useless (removes crucial dependencies)

[dependabot]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.