CSSStyleDeclaration contains readonly rule, so I excluded them, otherwise it doesn't make sense
I didn't touch the Runner css() because I don't know the exact behavior of it.
Coverage remained the same at 99.924% when pulling 8447a268737da54d44b99849bf3600a00c2f8983 on Glandos:patch-1 into 18e4db2688f6b11eb5c57b6ab6ad0bb1ad6abb42 on svgdotjs:master.
CSSStyleDeclaration contains readonly rule, so I excluded them, otherwise it doesn't make sense I didn't touch the Runner
css()
because I don't know the exact behavior of it.