typings/fix: improve typings (#310)
typings/fix: improve typings (#310)

* typings/fix: improve typings

* style: use tabs

* typings/fix: type is optional

* typings/fix: add correct overloads for `say` method

* typings/fix(Client): use correct overload for on/once/emit

* typings/fix: use `object` over `Object`
Gawdl3y/discord.js-commando,Gawdl3y/discord.js-commando,Gawdl3y/discord.js-commando