chore(v3.2.x): release 3.2.19

[github-actions]

🤖 I have created a release beep boop

3.2.19 (2023-01-31)

Bug Fixes

• Add mux.js to support.html (#4923) (cec295a)
• DASH: Fix dynamic manifests from edgeware (#4914) (03c95ee)
• Fix MediaCapabilities polyfill on Hisense (#4927) (c217de0)
• Fix WebVTT parser failure on REGION blocks (#4915) (f4e8518)
• HLS: Fix detection of WebVTT subtitles in HLS by extension (#4928) (245234c), closes #4929
• VTT: Fix combining style selectors (#4934) (2625fdf)
• WebVTT: Add support to  , ‎ and ‏ (#4920) (ff36a0a)
• WebVTT: Add support to voice tag styles (#4845) (88602be)
• WebVTT: Fix horizontal positioning with cue box size (#4949) (cb26238)
• WebVTT: Fix voices with styles and support to multiple styles (#4922) (8624759)

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[github-actions]

🤖 Release is at https://github.com/shaka-project/shaka-player/releases/tag/v3.2.19 🌻