Update grok to version 1.1.0

I've released 1.1.0 of `grok`, I think you want to use it!

Author: daschl

Cargo.toml

@@ -117,7 +117,7 @@ lazy_static = "1.3.0"
 rlua = { git = "https://github.com/timberio/rlua" }
 num_cpus = "1.10.0"
 bytesize = "1.0.0"
-grok = "1.0.0"
+grok = "1.1.0"
 nom = "5.0.0"
 uuid = { version = "0.7", features = ["serde", "v4"] }
 exitcode = "1.1.2"