The version v0.10.1-beta of lnd is quite old with v0.13.0-beta just
being published as RC2. Maintaining backward compatibility in the
lndclient library is quite an effort. We decided to merge the v0.11.1
branch into master meaning that all our projects now have this minimum
version requirement.
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.
We update to the newest version of lnd so we can use the updated
macaroon service.
NOTE: This is a compile time dependency update only, no RPC level update
is required.
