Warp: Release 0.2

[seanmonstar]

I can't think of anything else blocking the release. @jxs can you?

[jxs]

only #318 I think, do you want me to update it and resolve conflicts, or do you prefer to derive from it?

[seanmonstar]

For #318, I don't yet know what the Certificate type should look like. I think we can punt, since it's possible to create that functionality outside warp now, combining warp::service and extensions.

[jxs]

ok, great! let's release 0.2 then 🙌🏻