message: Removed strict version for rust backtrace crate
diff: @@ -24,7 +24,6 @@ crate-type = ["rlib"]
  [dependencies]
  failure = "0.1.2"
  -backtrace = "=0.3.9" # remove after will be solved: https://github.com/alexcrichton/backtrace-rs/issues/136
  futures = "0.1.24"
  lazy_static = "0.2"
  log = { version = "0.4.1", features = ["std"] }
  