spaghetti edition

introducing spaghetti edition: now with 5000% more spaghetti!

A lot of very minor back-end things. And also a new command. And more Despacito.
...I should have named this one "wait, it's all despacito?" huh...

+ additions +

• Added 6 new videos to this is so sad play despacito.
  • I'd list them, but I'm very lazy.
  • Turns out that some videos don't have maxresdefault.jpg thumbnails (and so, Kiryu Coco - Despacito has no thumbnail). I'll fix it it later. I've fixed it by adding an override property for one thumbnail. If there's no maxresdefault.jpg, I'll use the hqdefault.jpg instead.
• More errors! Attempting to send a NSFW video in a non-NSFW channel will return you an error, and so will choosing an out-of-bounds value.
• Added decide command. Feed Give slabbot some things, separated by commas, and they'll choose a random one!
• slabbot now has the prefix sl . (You can still use slabbot and mentions.)
• More README.mds! and also hopefully slightly better.

- removals -

• Removed dependencies sqlite and sequelize (and probably some more). I plan to use mongoose.
• Removed slabbot-banner.png, replaced with slabbot-icon.png (in the README). It looked bad.

~ other changes ~

• Fixed a typo + reworded a thing in commandinfo.json (used in the help command.)

> code stuff <

• Now utilizing eslint. Because my code is bad.
• Turns out that you can set default values for properties (e.g. constructor(a, b = true, c = 5);). That's used once in despacito.js.

Anyways, that's a second number increment. I feel like it's deserved. New command and some other things. Next release should hopefully add MongoDB or some other things.