message: subscriber: upgrade sharded-slab to 0.0.7 to fix 32-bit build
  Currently tracing-subscriber doesn't compile on 32-bit platforms as
  discussed here:
  The underlying issue has been fixed by This pull simply updates
  the dependency inside this project. Thanks for your work on this!
diff: @@ -49,7 +49,7 @@ tracing-serde = { version = "0.1.0", optional = true }
  parking_lot = { version = ">= 0.7, < 0.10", optional = true }
  # registry
  -sharded-slab = { version = "0.0.6", optional = true }
  +sharded-slab = { version = "0.0.7", optional = true }
  [dev-dependencies]
  tracing = "0.1"
  