handle snake_case or camelCase

[mkinney]

partial fix for #230

[codecov]

Codecov Report

Merging #231 (db09b47) into master (90e5b47) will increase coverage by 1.16%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #231      +/-   ##
==========================================
+ Coverage   92.21%   93.37%   +1.16%     
==========================================
  Files          12       12              
  Lines        1798     1842      +44     
==========================================
+ Hits         1658     1720      +62     
+ Misses        140      122      -18     

Flag	Coverage Δ
unittests	93.37% <100.00%> (+1.16%)	⬆️

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Impacted Files	Coverage Δ
meshtastic/node.py	100.00% <ø> (ø)
meshtastic/__main__.py	96.73% <100.00%> (+3.46%)	⬆️
meshtastic/globals.py	100.00% <100.00%> (ø)
meshtastic/util.py	98.06% <100.00%> (+0.07%)	⬆️

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