fix(Message): reply method;

[birongliu]

Please describe the changes this PR makes and why it should be merged:
this PR will check if there is a replyTo option exist in reply method; if there is, it would reply to message according to replyTo property pass into the reply method by end user if not it would default to current message (this).

Status and versioning classification:

• Code changes have been tested against the Discord API, or there are no code changes

[monbrey]

I don't think this is the direction we want to take on this. It's been discussed internally by the maintainers, and I think the agreement was that Message#reply should not accept replyTo at all.

TextChannel#send is where the replyTo option can be used correctly.

Edit: It's already been done #5296