[8.x] Add bcmath as an extension suggestion

[timacdonald]

The multiple_of validation rule requires bcmath. Added as a suggestion in 8.x but it might be good to make a hard requirement in 9.x for a smoother transition?

I can add a note to the docs as well indicating that this ext is needed if you wanna merge this one.

[driesvints]

Good idea to add it to suggest but I wouldn't add a hard dependency to require in 9.x if it's only for one validation rule.

Can you also add the suggest in the composer.json of the validation component?

It's indeed a good idea to also PR to the docs of this validation rule that this extension is required 👍

[driesvints]

I added the extra suggest here: b53152b

[timacdonald]

Sounds good to me Dries. Just sent up the docs PR for ya.

[driesvints]

@timacdonald thanks man :)

[timacdonald]

Me right now...