Bump lazysizes from 5.1.2 to 5.2.1

[dependabot[bot]]

Bumps lazysizes from 5.1.2 to 5.2.1.

Changelog

Sourced from lazysizes's changelog.

5.2.1

• BlurUp-Plugin: Copy style attribute (#764)
• Fixes minor security issue with video-embed plugin (#764)
• Built: Update dependencies (#774, #756)
• Fixes diverse issues with old AMD module pattern (#780, #779)

5.2.0

• Fix wrong window context under very rare SSR (fixes #717)
• Fix Safari Back-Forward Cache issue with lazyloading image elements (fixes #711)
• Add lazyload of autoplay videos to unveilhooks (fixes #697)

Commits

• eee2d40 Merge remote-tracking branch 'origin/gh-pages' into gh-pages
• e13530a 5.2.1
• 43cdb48 Merge pull request #781 from Philzen/patch-1
• 3270a0b Fix a typo in README.md
• 60458e6 5.2.1-rc2
• b12ac7f 5.2.1-rc1
• e84ac98 5.2.1-rc1
• 1ce9198 Merge branch 'gh-pages' of https://github.com/aFarkas/lazysizes into gh-pages
• 9803587 Merge pull request #780 from emkayy/amd-for-plugins-umd
• 47909c1 BlurUp-Plugin: Copy style attribute (fixes #746)
• Additional commits viewable in compare view

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[dependabot[bot]]

Looks like lazysizes is up-to-date now, so this is no longer needed.