Merge pull request #12 from direktspeed/renovate/async-2.x

Update dependency async to v2.6.0

Author: frank-dspeed

Diff for: package.json

@@ -21,7 +21,7 @@
   "homepage": "https://projects.dspeed.eu/peep/drivers/gt511c3-fps#readme",
   "dependencies": {
     "socket.io-client": "^2.0.3",
-    "async": "2.5.0",
+    "async": "2.6.0",
     "promise": "8.0.1",
     "serialport": "^6.0.0"
   },