fix: compile passing

eldesh · eldesh · commit 7a9b31fb4847 · 2018-12-24T20:41:54.000-08:00
avoid `cargo package` error
diff --git a/Cargo.toml b/Cargo.toml
@@ -25,6 +25,7 @@ ssl = ["openssl", "hyper/ssl"]
 
 [dependencies]
 error-chain = "0.5.0"
+backtrace-sys = "=0.1.23"
 hyper = { version = "0.9", default-features = false }
 openssl = { version = "0.7", optional = true }
 serde = "1.0"
