Add benchmarks

[shreyasminocha]

Issue #31

[mihai-vlc]

it might also be useful to create a section in the readme to explain how to run the benchmark and how to interpret the results

λ  node .\benchmark\run
╔═════════════════════╤═══════════╤═════════════╗
║ Description         │ Time      │ Uncertainty ║
╟─────────────────────┼───────────┼─────────────╢
║ VerEx  constructor  │ 962ns     │ ±1.18%      ║
║ RegExp constructor  │ 105ns     │ ±3.32%      ║
╟─────────────────────┼───────────┼─────────────╢
║ VerEx  startOfLine  │ 1µs 296ns │ ±1.62%      ║
║ RegExp startOfLine  │ 29ns      │ ±2.51%      ║
╟─────────────────────┼───────────┼─────────────╢
║ VerEx  endOfLine    │ 1µs 249ns │ ±0.49%      ║
║ RegExp endOfLine    │ 28ns      │ ±1.28%      ║
╟─────────────────────┼───────────┼─────────────╢
║ VerEx  then|find    │ 2µs 73ns  │ ±1.80%      ║
║ RegExp then|find    │ 18ns      │ ±1.62%      ║
╟─────────────────────┼───────────┼─────────────╢
║ VerEx  maybe        │ 2µs 83ns  │ ±1.07%      ║
║ RegExp maybe        │ 50ns      │ ±1.37%      ║
╟─────────────────────┼───────────┼─────────────╢
║ VerEx  anything     │ 1µs 261ns │ ±1.33%      ║
║ RegExp anything     │ 33ns      │ ±0.71%      ║
╟─────────────────────┼───────────┼─────────────╢
║ VerEx  anythingBut  │ 2µs 368ns │ ±0.48%      ║
║ RegExp anythingBut  │ 67ns      │ ±2.09%      ║
╟─────────────────────┼───────────┼─────────────╢
║ VerEx  something    │ 2µs 125ns │ ±1.28%      ║
║ RegExp something    │ 55ns      │ ±1.62%      ║
╟─────────────────────┼───────────┼─────────────╢
║ VerEx  somethingBut │ 2µs 229ns │ ±2.02%      ║
║ RegExp somethingBut │ 83ns      │ ±1.87%      ║
╚═════════════════════╧═══════════╧═════════════╝

[mihai-vlc]

Can we fix the conflicts for package.json here ?

[mihai-vlc]

Once the conflicts are resolved, this is approved.