Forked benchmark.js with a Bencher integration

[SignpostMarv]

I wanted to use bencher to ensure I wasn't negatively impacting performance when making changes in my lunr.js fork, found benchmark.js but felt the compulsion to fork that as well, so now the fork has a "bencher integration" to help output benchmarks with bencher's native json format.

• forked benchmark.js https://github.com/satisfactory-dev/benchmark.js
• bencher integration deployed: https://github.com/satisfactory-dev/lunr.js/blob/c5a143e12a4ddc3a7d66258434777ff3008d9293/perf/perf_helper.ts#L71
• results chugging away nicely https://bencher.dev/console/projects/satisfactory-dev-lunr-fork/reports