Eleventy Image v0.10.0

• Upgrades sharp to fix upstream issues with AVIF images in Chrome 93. Read more at #91
  • Other improvements to AVIF in sharp in v0.29 via @lovell https://twitter.com/lovell/status/1427655568102133760
    • Faster encoding, ~2x previous speed
    • Higher quality, no chroma subsampling
    • Smaller installation, less than 20MB
• Now requires Node 12+ (v0.9.x required Node 10+)
• Other dependency updates.

Relevant milestone: https://github.com/11ty/eleventy-img/milestone/13?closed=1