chore(v4.2.x): release 4.2.13

[github-actions]

🤖 I have created a release beep boop

4.2.13 (2023-08-20)

Bug Fixes

• add MIME type for HTML5 tracks (#5452) (e540ac1)
• Default language to 'und' for native tracks (#5464) (aeda19d)
• Fix exiting fullscreen on Safari (#5439) (9121a52), closes #5437
• Fix memory leak on SimpleAbrManager (#5478) (5c352c8)
• gettting maxWidth and maxHeight for restrictToElementSize option (#5481) (eca8436)
• Remove duplicate adaptation event before init (#5492) (08708f0)
• Support fLaC and Opus codec strings in HLS (#5454) (18d5971), closes #5453
• UI: Disable right click on range elements (#5497) (c508446)
• Update karma-local-wd-launcher to fix Chromedriver >= 115, fix M1 mac (#5489) (1789977)
• Update karma-local-wd-launcher to fix Edge >= 115 (#5506) (d7d9efe)
• WebVTT: Fix text-shadow in WebVTT not working (#5499) (853ccd8)

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[github-actions]

🤖 Release is at https://github.com/shaka-project/shaka-player/releases/tag/v4.2.13 🌻