Update asm-cleanup to petgraph 0.8

Author: shepmaster

compiler/base/asm-cleanup/Cargo.toml

@@ -6,6 +6,6 @@ edition = "2018"
 [workspace]
 
 [dependencies]
-petgraph = "0.7.0"
+petgraph = "0.8.1"
 regex = "1.0.0"
 rustc-demangle = "0.1.5"

compiler/base/asm-cleanup/src/lib.rs

@@ -75,7 +75,7 @@ pub fn filter_asm(block: &str) -> String {
     let mut line_info = Vec::new();
     let mut labels = HashSet::new();
     let mut opcode_operands = HashSet::new();
-    let mut label_graph = DiGraphMap::new();
+    let mut label_graph: DiGraphMap<_, _> = Default::default();
 
     // Note the type of data held on each line of the block
     for line in block.lines() {