Update dependency async-mutex to ^0.4.0

Author: renovate[bot]

package-lock.json

@@ -28,7 +28,7 @@
     },
     "homepage": "https://github.com/devicehive/devicehive-ws-proxy#readme",
     "dependencies": {
-        "async-mutex": "^0.3.2",
+        "async-mutex": "^0.4.0",
         "axios": "^0.27.2",
         "debug": "^4.3.4",
         "devicehive-proxy-message": "^1.0.13",