Increase loopdev-3 dependency lower bound to 0.5.3

This ensures that all stratisd dependencies are built with the same
bindgen version.

Signed-off-by: mulhern <amulhern@redhat.com>

Author: mulkieran

Cargo.toml

@@ -244,7 +244,7 @@ optional = true
 [dev-dependencies]
 assert_cmd = "2.2.0"
 assert_matches = "1.5.0"
-loopdev-3 = "0.5.1"
+loopdev-3 = "0.5.3"
 predicates = "3.1.0"
 proptest = "1.0.0"