heisenbridge: unstable-2021-05-23 -> unstable-2021-05-29
heisenbridge: unstable-2021-05-23 -> unstable-2021-05-29

Critically, this includes the changes from hifi/heisenbridge#78 which
adds an entrypoint so that the executable works.

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs