Update dependency getmac to v5

Author: renovate-bot

package-lock.json

@@ -8,7 +8,7 @@
   },
   "dependencies": {
     "debug": "^3.1.0",
-    "getmac": "1.5.0",
+    "getmac": "5.0.0",
     "ip": "1.0.2",
     "pcap": "mranney/node_pcap"
   },