svg/svgo v3.1.0 on GitHub

What's Changed

Prefix IDs, correctly prefix IDs when <style> tag contains XML comments. By @john-neptune in #1736
Remove Hidden Elements, improve handling of definitions (<defs>), namely when <defs> are defined at the end of the document. By @KTibow in #1879
Cleanup Enable Background, clean up inline-styles too. By @SethFalco in #1866
Cleanup IDs, handle URI encoded references properly. By @SethFalco in #1880
Inline Styles, no longer crashes on non-inlined selectors with a pseudo-class. By @SethFalco in #1865
Improve handling of URL references in reference attributes (url('#a')) across various plugins. By @SethFalco in #1881

Remove Unknowns and Defaults, now removes defaults in XML declarations too, enabled by default and can be toggled with defaultMarkupDeclarations. By @SethFalco in #1872

Before and after using vectors from various sources, with the default preset of each respective version:

SVG	Original	v3.0.5	v3.1.0	Delta
Arch Linux Logo	9.529 KiB	4.608 KiB	4.162 KiB	⬇️ 0.446 KiB
Blobs	50.45 KiB	42.949 KiB	42.949 KiB
Isometric Madness	869.034 KiB	550.153 KiB	550.153 KiB
tldr-pages Banner	2.071 KiB	1.07 KiB	1.07 KiB
Wikipedia Logo	161.551 KiB	117.146 KiB	116 KiB	⬇️ 1.146 KiB

Before and after of the browser bundle of each respective version:

	v3.0.5	v3.1.0	Delta
svgo.browser.js	657.5 kB	660.9 kB	⬆️ 3.4 kB