Update Rust crate assert_cmd to v2

Author: renovate[bot]

Cargo.lock

@@ -19,7 +19,7 @@ url = "2"
 log = "0.4"
 
 [dev-dependencies]
-assert_cmd = "1.0"
+assert_cmd = "2.0"
 predicates = "1"
 
 # Settings here are because we care more about size than speed