New metrics related to images + update of dependencies

Rules added

• New Old Image Format rule that converts to WebP & AVIF and compares weight
• New Excessive Image Density rule to help detect when very high density screens load heavy images
• New Incorrect Sizes Attribute rule that checks accuracy of the "sizes" attribute on responsive images

Rules updated

• Image Optimization now also checks if WebP and AVIF images can be optimized
• Image Optimization does not try to compress PNGs in lossless mode anymore
• Oversized Images is more accurate and compares to real image layout
• Below the Fold Images now correctly detects native lazyloading

API changes

• waitForResponse option removed (was deprecated)
• Screenshot URL removed from the JSON response (but is still easy to guess from the run ID)

Under the hood

• Chrome upgraded to v114
• Requires NodeJS >= 18