fix(dom): Remove Number type from style arg value
fix(dom): Remove Number type from style arg value

As mentioned in processing/p5.js#4556 CSS does not accept a numeric
value and will fail silently. As such the documentation for valid
argument type passed to the style method has been updated so as not to
mislead developers in using a Number value.

processing/p5.js,limzykenneth/p5.js,limzykenneth/p5.js,processing/p5.js,dhowe/p5.js,dhowe/p5.js