fix(Guild): name acronym

[papaia]

Please describe the changes this PR makes and why it should be merged:
Fixes the guild name acronym generation to be the same as the one the Discord app uses (taken from DJScias/Discord-Datamining, search the page for t.getAcronym = f to find the definition).

Status

• Code changes have been tested against the Discord API, or there are no code changes
• I know how to update typings and have done so, or typings don't need updating

Semantic versioning classification:

• This PR changes the library's interface (methods or parameters added)
  • This PR includes breaking changes (methods removed or renamed, parameters moved or removed)
• This PR only includes non-code changes, like changes to documentation, README, etc.

[Fyko]

Relevant code for anyone who doesn't want to download the almost 40mb file:

t.getAcronym = function(e) {
	return null != e ? e.replace(/'s /g, " ").replace(/\w+/g, (function(e) {
		return e[0]
	})).replace(/\s/g, "") : ""
}