fix strokeCap prop not being passed to foreground arc from /Circle.js

[byronhallett]

The default prop was being used, and the circle progress bar was always being
rendered with 'butt' type strokeCap

[oblador]

Thanks for your PR! Looking at the changes there's a bunch of them that seems unrelated to the bug you're describing, can you explain what they do?

[byronhallett]

Oh no! Those aren't supposed to be there.
Would you like to close this PR and I'll make another one for only this fix?

The other changes are related to having an unclosed circle and don't belong in this PR.
The result is this:

[oblador]

You can just update this PR and I'll squash it :-)

[byronhallett]

Ok, thanks, I've reverted that commit.
Thanks for being patient with me. I'd assumed that the PR wouldn't auto update to include commits post creation.
Good to know :)

[oblador]

Thanks man!

[oblador]

Released in 3.4.0.

[mak12]

Oh no! Those aren't supposed to be there. Would you like to close this PR and I'll make another one for only this fix?

The other changes are related to having an unclosed circle and don't belong in this PR. The result is this:

@byronhallett did you push change for this view?