greetd 0.10.1

This bugfix release reintroduces the XDG_VTNR environment variable which
some X11 sessions were relying on. It also changes the error behavior
when a greeter incorrectly sends a user response when there is no
question to answer.

Kenny Levinsen (6):
      Reintroduce XDG_VTNR
      context: Error on unexpected auth message response
      greetd: Scramble response texts after use
      greetd_ipc: Fix docs.rs build
      greetd_ipc: Show required codec features in docs
      Bump version to 0.10.1