update regex crate

Cargo.toml

@@ -90,7 +90,7 @@ itertools = {version = "0.10.3", optional = true}
 darkfi-derive = {path = "src/util/derive", optional = true}
 darkfi-derive-internal = {path = "src/util/derive-internal", optional = true}
 chrono = {version = "0.4.19", optional = true}
-regex = {version = "1.1.9", optional = true}
+regex = {version = "1.5.5", optional = true}
 
 # Misc
 termion = {version = "1.5.6", optional = true}