refactor: move loader.js into loader/index.js

Author: dominykas

lib/loader.js renamed to lib/loader/index.js

@@ -3,12 +3,12 @@
 const Debug = require('debug');
 const Fs = require('fs');
 const GitUrlParse = require('git-url-parse');
-const Package = require('../package.json');
+const Package = require('../../package.json');
 const Pacote = require('pacote');
 const Path = require('path');
 const Wreck = require('@hapi/wreck');
 
-const Utils = require('./utils');
+const Utils = require('../utils');
 
 const internals = {
     cache: new Map(),