Update serialport to support newer node versions

[michbeck100]

The serial port dependency should be update to support newer versions of node. With the current version 6.6.2 not even node 12 is working.

[nona00]

when using node v18.19.0 serialport 8.0.8 is necessary:

"dependencies": { "bluebird": "^3.5.3", "otaat-repl": "^1.0.2", "rfcontroljs": "~0.0.61", "serialport": "^8.0.8" },