Updated go-serial library to v1.6.3

[cmaglie]

Please check if the PR fulfills these requirements

• The PR has no duplicates (please search among the Pull Requests
  before creating one)
• Tests for the changes have been added (for bug fixes / features)

What kind of change does this PR introduce?
Updated go-serial library to fix #1000.

What is the current behavior?
Agent is not able to open CH340-based serial ports

What is the new behavior?
Agent should be able to open CH340-based serial ports

Does this PR introduce a breaking change?
No

Other information:
Fix #1000

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 20.14%. Comparing base (1b94ccc) to head (771a58a).
Report is 7 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1023   +/-   ##
=======================================
  Coverage   20.14%   20.14%           
=======================================
  Files          42       42           
  Lines        3222     3222           
=======================================
  Hits          649      649           
  Misses       2488     2488           
  Partials       85       85           

Flag	Coverage Δ
unit	20.14% <ø> (ø)

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