uuid-ossp extension for pg-mem

Installation

Using npm:
``bash
$ {sudo -H} npm i -g npm
$ npm i --save pg-mem-uuid-ossp
`

Usage

In Node.js:
`js
var { newDb } = require('pg-mem');
var { uuidOssp } = require('pg-mem-uuid-ossp');
`

With typescript:
`typescript
import { newDb } from 'pg-mem';
import { uuidOssp } from 'pg-mem-uuid-ossp';
`

Then use it:
`js
const db = newDb();
db.registerExtension('uuid-ossp', uuidOssp);
...
db.public.many(
create extension "uuid-ossp";
select uuid_generate_v4();
);
`

Functions defined

This extension intends to emulate the PostgreSQL uuid-ossp` extension, so it defines the following functions:

$3

- uuid_generate_v1() -> uuid
- uuid_generate_v1mc() -> uuid (synonym for uuid_generate_v1)
- uuid_generate_v3(namespace uuid, name text) -> uuid
- uuid_generate_v4() ->
- uuid_generate_v5(namespace uuid, name text) -> uuid

$3

The RFC4122 defines
4 UUID namespaces that PostgreSQL uuid-ossp extension returns in the following 4 functions:
- uuid_ns_dns() -> uuid
- uuid_ns_url() -> uuid
- uuid_ns_oid() -> uuid
- uuid_ns_x500() -> uuid

That RFC also defines a Nil UUID:
- uuid_nil() -> uuid