feat: Add build script and publish a version for Deno

[daffl]

Since @feathersjs/hooks is written in TypeScript there is no reason for it to not work with Deno (a new JS/TypeScript runtime). Except that the TypeScript for Node and Deno module import syntax is not compatible. In order to import the module properly like

import { hooks } from 'https://unpkg.com/@feathersjs/hooks@0.1.0/deno/index.ts';

We need to rewrite the module names to add the .ts extension (which for not so great reasons gives a compiler error in normal TypeScript).