Updating 'svgo' to v2.8.0 and newest Wikimedia SVG guidelines – mainly around new whitespace features of SVGO. Change-Id: I4a9b0efb9fe8d4648a4d218397cf3d9548552421
SVGO v2.x changed configuration to JS, amending configuration. Adding new 'minify-svg' npm script. Also re-crushing SVGs. Bug: T278656 Change-Id: I63ed0974eab40c4d6cd5198f780bfd3466357a0d