Update opener.

Author: ehuss

clippy_dev/Cargo.toml

@@ -8,7 +8,7 @@ edition = "2018"
 bytecount = "0.6"
 clap = "2.33"
 itertools = "0.9"
-opener = "0.4"
+opener = "0.5"
 regex = "1"
 shell-escape = "0.1"
 walkdir = "2"