add passive event support

[undirectlookable]

Explain Document - https://developers.google.com/web/tools/lighthouse/audits/passive-event-listeners

It makes scroll smoother.

[stutrek]

Thank you! Someone made a request for this in #56 when version 2 came out, it's great to have the new feature.

I have some requests, but they are all very minor.

• useCapture is declared in an if statement and used in a following block. Although it works, please don't do this as it is confusing. You can declare it at the base level of the module instead, possibly with just the try/catch and no function call.
• isSupportsPassive is grammatically incorrect, a better name would be browserSupportsPassive or passiveIsSupported. If you remove the function call this is no longer important.
• Change spaces to tabs
• Change double quotes to single quotes.