chore: upgrade deno_graph 0.50 (#344)

Author: dsherret

Cargo.lock

@@ -18,7 +18,7 @@ name = "ddoc"
 anyhow = { version = "1.0.58", optional = true }
 cfg-if = "1.0.0"
 deno_ast = "0.27.0"
-deno_graph = "0.49.0"
+deno_graph = "0.50.0"
 futures = "0.3.26"
 import_map = "0.15.0"
 lazy_static = "1.4.0"