Bump pyoxidizer version

Bug: 67
Change-Id: I47f9d4d2bdd1d22fa49dd9b3ef03b1e527ee2574
diff --git a/pw_env_setup/py/pw_env_setup/cargo_setup/packages.txt b/pw_env_setup/py/pw_env_setup/cargo_setup/packages.txt
index 32c9983..5c2b50b 100644
--- a/pw_env_setup/py/pw_env_setup/cargo_setup/packages.txt
+++ b/pw_env_setup/py/pw_env_setup/cargo_setup/packages.txt
@@ -15,4 +15,4 @@
 # Rust packages to install via cargo.
 # Format: "package version"
 
-pyoxidizer 0.4.0
+pyoxidizer 0.6.0