https://github.com/lightningnetwork/lnd/releases/tag/v0.5.1-beta

"This release is minor release of lnd, which includes several fixes and optimizations to make lnd even better. This time around one of the points of focus has been around the reliability, robustness and speed of the Neutrino backend, which is now in a state where it can be used for building applications for the Bitcoin testnet. This will let us sort out the last quirks and performance bottlenecks before it is ready to be enabled for mainnet."