chore(v4.0.x): release 4.0.3

[github-actions]

🤖 I have created a release beep boop

4.0.3 (2022-06-14)

Bug Fixes

• demo: allow switch between UITextDisplayer and SimpleTextDisplayer (#4275) (e8c04cd)
• demo: erroneous FairPlay keysystem in demo (#4276) (1abfdb1)
• hls: Fix AV sync issues, fallback to sequence numbers if PROGRAM-DATE-TIME ignored (#4289) (629a21d), closes #4287
• New EME polyfill fixes EME/MCap issues on some smart TVs (#4279) (e55350f)
• Populate track's spatialAudio property (#4291) (46343f0)
• Remove IE 11 from default browsers for Windows (#4272) (1e83080), closes #4271
• Use middle segment when guessing MIME type on HLS (#4269) (#4270) (5406429)

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[github-actions]

🤖 Release is at https://github.com/shaka-project/shaka-player/releases/tag/v4.0.3 🌻