chore: update to latest discordjs and node.

[laquasicinque]

• ⬆️ updated all packages to latest except for eslint because that's going to be a chore until @ljosberinn updates his config (nudge nudge 👀)
• ➖ Removed ts-node, it's dead. removed nodemon too as it's not required anymore
• ➕ Added tsx (typescript execute, not to be confused with the react kind), does what nodemon and ts-node used to do together
• ♻️ refactored code to match the latest version of discordjs