fix(select): updates onChange prop to be optional

[akornmeier]

• update: onChange prop to be optional
• update: removes default value from function signature to be assigned later if prop value is nullish

Closes issue: #389

[schne324]

all of this diff seems weird but I remember you told me yesterday that there were agora deps checked into source? I'm not seeing those removed here...I'm also not seeing any agora deps in the yarn.lock in the develop branch either 🤔

[akornmeier]

They were from my initial commit. I removed them by uninstalling and reinstalling the cross-env package

[akornmeier]

i had my Deque npmrc pointed to agora when I checked in the first time.

[schne324]

so this patch doesn't update any deps but has yarn.lock diffs?

[akornmeier]

@schne324 - I reverted the yarn.lock changes that were caused by my DQ .npmrc config. I will need a re-thumb.

[schne324]

Not gonna hold this up for some yarn.lock nonsense...ideally we'd back those changes out though 🤷