Updated used dfu-util to latest version available (#630)

Platformio now has dfu-util 0.11 available in package tool-dfuutil.
See https://registry.platformio.org/tools/platformio/tool-dfuutil

Author: jhaand

platform.json

@@ -324,7 +324,7 @@
       "type": "uploader",
       "optional": true,
       "owner": "platformio",
-      "version": "~1.9.190708"
+      "version": "~1.11.0"
     },
     "tool-cmake": {
       "optional": true,