message: subscriber: upgrade to smallvec 1.0
  # Motivation
  The smallvec 0.6 dependency is causing some duplicate dependencies in
  quinn. smallvec 1.0 has been released in November, it would be nice not
  to have to build it twice.
  ## Solution
  Upgrade to the 1.0 version.
diff: @@ -36,7 +36,7 @@ tracing-core = "0.1.2"
  # only required by the filter feature
  matchers = { optional = true, version = "0.0.1" }
  regex = { optional = true, version = "1" }
  -smallvec = { optional = true, version = "0.6.10"}
  +smallvec = { optional = true, version = "1"}
  lazy_static = { optional = true, version = "1" }
  # fmt
  