update petgraph

Author: sokra

Cargo.lock

@@ -403,7 +403,7 @@ owo-colors = "4.2.2"
 parcel_selectors = "0.28.2"
 parking_lot = "0.12.1"
 pathdiff = "0.2.1"
-petgraph = "0.6.3"
+petgraph = "0.8.3"
 pin-project-lite = "0.2.9"
 postcard = "1.0.4"
 proc-macro2 = "1.0.79"