chore: update itertools to 0.14 (#140)

Co-authored-by: Andrew Lamb <andrew@nerdnetworks.org>

Author: acrrd

pbjson-build/Cargo.toml

@@ -13,7 +13,7 @@ repository = "https://github.com/influxdata/pbjson"
 heck = "0.5"
 prost = "0.14"
 prost-types = "0.14"
-itertools = "0.13"
+itertools = "0.14"
 
 [dev-dependencies]
 tempfile = "3.1"