Update eslint
Update nlcst-to-textom, textom

This update improves performance.
Update benchmark results in `Readme.md`
Refactor npm script targets in `package.json`
Add link to personal website to copyright in `Readme.md`
Fix example to be valid JS in `Readme.md`
Fix typos in `Readme.md`

`its` > `it's`.
Fix benchmark results in `Readme.md`
Update changelog for 0.5.0-rc.1
0.5.0-rc.1