This commit bumps the _compile time_ version of lnd to v0.13.0-beta.rc2.
This does not have an effect on the user, the run time backward compatibility
will be preserved. Only the next commit will bump that minimum version.
Since the lsat code was copied over to aperture a while ago for other
projects to use as well, we should migrate over to that shared code
also. This will give us the recently added "remove token if payment
failed and try again" feature for free along with some other small
updates to the lsat package.
