Upgrade clap to 2.34.0

That includes the fix of preventing panicking on a broken pipe.
clap-rs/clap@accf3d2

Author: weihanglo

Cargo.toml

@@ -61,7 +61,7 @@ toml = "0.5.7"
 unicode-xid = "0.2.0"
 url = "2.2.2"
 walkdir = "2.2"
-clap = "2.31.2"
+clap = "2.34.0"
 unicode-width = "0.1.5"
 openssl = { version = '0.10.11', optional = true }
 im-rc = "15.0.0"