wip/node-re2 1.23.0 NetBSD

TODO: Adjust the following lines from README.md

# node-re2 [![NPM version][npm-img]][npm-url]

[npm-img]: https://img.shields.io/npm/v/re2.svg [npm-url]: https://npmjs.org/package/re2

This project provides Node.js bindings for [RE2](https://github.com/google/re2): a fast, safe alternative to backtracking regular expression engines written by [Russ Cox](http://swtch.com/~rsc/) in C++. To learn more about RE2, start with an overview [Regular Expression Matching in the Wild](http://swtch.com/~rsc/regexp/regexp3.html). More resources can be found at his [Implementing Regular Expressions](http://swtch.com/~rsc/regexp/) page.

`RE2`'s regular expression language is almost a superset of what is provided by `RegExp` (see [Syntax](https://github.com/google/re2/wiki/Syntax)), but it lacks two features: backreferences and lookahead assertions. See below for more details.

`RE2` always works in the [Unicode mode](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/unicode), which means that all matches that use character codes are interpret as Unicode code points, not as binary values of UTF-16. See `RE2.unicodeWarningLevel` below for more details.

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