deps: bump regex from 1.7.1 to 1.7.3

Pull-Request: #3687.

Author: dependabot[bot]

Cargo.lock

@@ -28,7 +28,7 @@ smallvec = "1.6.1"
 quick-protobuf = "0.8"
 quick-protobuf-codec = { version = "0.1", path = "../../misc/quick-protobuf-codec" }
 hex_fmt = "0.3.0"
-regex = "1.5.5"
+regex = "1.7.3"
 serde = { version = "1", optional = true, features = ["derive"] }
 thiserror = "1.0"
 wasm-timer = "0.2.5"