refactor!: welp, a lot of stuff

- Use the OS temp folder to cache the player, closes #57.
- Added support for editing channel name, closes #40.
- Added support for editing channel description.
- Added support for retrieving basic channel analytics, closes #54.
- Moved `Innertube#getAccountInfo()` to `Innertube#account`, and renamed it to `getInfo()`.
- `getInfo()` is now able to return email, channel id, etc.
- Improved jsdoc.

lib/utils/Constants.js

@@ -1,7 +1,5 @@
 'use strict';
 
-const Utils = require('./Utils');
-
 module.exports = {
   URLS: {
     YT_BASE: 'https://www.youtube.com',
@@ -44,15 +42,15 @@ module.exports = {
     }
   },
   STREAM_HEADERS: {
-    'Accept': '*/*',
-    'User-Agent': Utils.getRandomUserAgent('desktop').userAgent,
-    'Connection': 'keep-alive',
-    'Origin': 'https://www.youtube.com',
-    'Referer': 'https://www.youtube.com',
+    'accept': '*/*',
+    'connection': 'keep-alive',
+    'origin': 'https://www.youtube.com',
+    'referer': 'https://www.youtube.com',
     'DNT': '?1'
   },
   INNERTUBE_HEADERS_BASE: {
     'accept': '*/*',
+    'accept-encoding': 'gzip, deflate',
     'content-type': 'application/json',
   },
   METADATA_KEYS: [

lib/utils/Request.js

@@ -4,7 +4,12 @@ const Axios = require('axios');
 const Utils = require('./Utils');
 const Constants = require('./Constants');
 
+/** @namespace */
 class Request {
+  /**
+   * @param {Innertube} session
+   * @constructor
+   */
   constructor(session) {
     this.session = session;
 
@@ -68,14 +73,17 @@ class Request {
     }, (error) => {
       throw new Utils.InnertubeError(error.message, error);
     });
-
+    
+    /**
+     * Standardizes the API response and catches all errors.
+     */
     this.instance.interceptors.response.use((res) => {
       const response = {
         success: res.status === 200,
         status_code: res.status,
         data: res.data
       };
-
+      
       if (res.status !== 200)
         throw new Utils.InnertubeError(`Request to ${res.config.url} failed with status code ${res.status} ${res.statusText}`, response);
 
@@ -89,7 +97,9 @@ class Request {
   }
   
   /**
+   * Adjusts the context according to the given client.
    * @todo refactor this?
+   * @returns
    */
   #adjustContext(ctx, client) {
     switch (client) {

lib/utils/Utils.js

@@ -4,6 +4,7 @@ const Crypto = require('crypto');
 const UserAgent = require('user-agents');
 const Flatten = require('flat');
 
+/** @namespace */
 class InnertubeError extends Error {
   constructor (message, info) {
     super(message);