chore: make `mergeTags` props optional

[claeusdev]

Turns out in the demos and docs, there is no mention of mergeTags as a required prop but it still needs to be passed before typescript stops "bleeding".

[dstpierre]

I've look at the changes re: your code formatter. I'd say if you'd like, you may add the config in this PR as well, really as you wish.

[claeusdev]

I've looked at the changes re: your code formatter. I'd say if you'd like, you may add the config in this PR as well, really as you wish.

Sounds good. I'll add that