Add $qqq Command

Adds the $qqq command, which can only be run by a "bot admin", which kills the currently running game and shuts down the bot.

Also adds $admin (and new config) to support the setting of a bot admin.

Improved Game File Loading

Minor release which adds better warning messages about missing game files.

discord.io to discord.js Migration

Per #41, the bot has been migrated from the discord.io framework to discord.js.

Audit Fixes

Both GitHub and NPM flagged a few different dependencies of this project. This release updates these deps to remove those potentially bad deps.

Post-cleanup Release

This release should be pretty much the same as v0.13.0. It is just a release marking the refactor and unit tests as part of a stable build.

Updated Discord.io, Now Working on Windows

Updated discord.io to version that works with current Discord API. Also now supports running on Windows with a VM or the Linux Subsystem for Windows.

Fixed Plaintext Output Bug

Fixed a bug with the plaintext output that would sometimes cause dfrotz debugging information to also be outputted.

Tweaked Info Command Wording

Tweaked info command wording to be a little clearer; just like the title says.

Fixed Output Bug on Some Games

Fixed a bug where games with very large output were not being parsed properly by the parser.

Added Fix for Certain Text Adventures

Added fix for certain text adventures' output being cut off, thanks to @TheSofox