Add benchmark for tseep and fix arm64 install issue.

[Romick2005]

#263 Use forked version of sauce-test to fix npm install for node-chromedriver that supports arm64.
#257 Add browserify-events and tseep emitters to the benchmarks.

[joeyfigaro]

Do benchmarking dependencies need to be distributed/part of the distribution assets?

[Romick2005]

Benchmark has separate package.json. Main lib distributed package does not contains benchmark dependencies.