Add "noAnimateOnMount" prop

[AlicanC]

Fixes #186

Note: A better name could be decided for the prop.

[AlicanC]

There's also #87 where the opposite is requested. Maybe this could be renamed and turned into a three-option enum: "always", "onMount", "onUpdate"

[oblador]

Thank you for your PR! I think the enum approach would be better, would you mind updating the PR with this?

[Gyran]

This something I would want as well. I can continue on the PR if @AlicanC no longer need this?

What would be the expected behaviour for onUpdate? When we don't want to animate on mount, we just "finish" the animation so it looks like the animation is done. Is that something that would be wanted for the onUpdate case as well?
Can't really se a case where someone would set to only animate on onMount and then change the animate property.

[AlicanC]

I can continue on the PR if @AlicanC no longer need this?

We need this and we are using our fork for it. I don't have any time to spend for a PR though, so continue as you wish.

When we don't want to animate on mount, we just "finish" the animation so it looks like the animation is done.

Yes, this was the behavior we needed.

[sibelius]

can we have a animating props instead?

animating={true} will start animation?
animating={false} will stop animation?

@oblador what do you think of this approach?

we can check on componentDidUpdate if prop has updated to start and stop animation