RFC: TypeScript Prometheus Client for Deno

[justin....@gmail.com]

I've created a Prometheus client in TypeScript for Deno (https://deno.land) I was going to publish under my work open source.  Opening the conversation for discussion to see if I need to do anything else.  It has tests for all the components (Histogram, Counter, Gauge, and PushGateway).  Currently there is no Summary metric, but will implement that shortly.

General usage:

```ts

import { MetricsManager } from 'https://deno.land/x/pro...@v0.1.4 const httpTotalRequests = MetricsManager.getCounter("http_requests_total") .with({ service: "web" }); 

  httpTotalRequests.inc();

  ```

Currently have it here:

https://github.com/base698/promts/blob/master/src/histogram.ts