Add a benchmark script to tld.js to measure performance evolution

[remusao]

This PR adds a bin/benchmark script, measuring all functions part of the public API. I tried to design the set of URLs tested during the benchmark to be representative, and diverse enough to hit different corner cases (* rules, ICANN rules, Private rules, exceptions, unicode, etc.).

[remusao]

@oncletom Thanks for merging.

I tried to run the command: npx tldjs -c './bin/benchmark.js', but I get: command not found: tldjs. Am I missing something?

[thom4parisot]

@remusao yeah, I think I made a mistake. When I tested the command before publishing I did:

npx -p . -c './bin/benchmark.js'

So I assumed npx <package> -c ... would run the command as of the npm context of this package. Which is not the case… Will raise that at a separate issue.