fix #36, #33, tests for i2c and dyn on device

[sonelu]

fix #36, #33, tests for i2c and dyn on device

[codecov]

Codecov Report

Merging #39 into master will decrease coverage by 0.70%.
The diff coverage is 76.36%.

@@            Coverage Diff             @@
##           master      #39      +/-   ##
==========================================
- Coverage   91.70%   91.00%   -0.71%     
==========================================
  Files          23       23              
  Lines        1567     1600      +33     
  Branches      212      219       +7     
==========================================
+ Hits         1437     1456      +19     
- Misses         95      105      +10     
- Partials       35       39       +4     

Impacted Files	Coverage Δ
roboglia/dynamixel/bus.py	91.62% <0.00%> (ø)
roboglia/i2c/bus.py	91.02% <67.74%> (-8.98%)	⬇️
roboglia/base/device.py	92.50% <83.33%> (+0.39%)	⬆️
roboglia/base/register.py	94.48% <100.00%> (+0.40%)	⬆️
roboglia/base/sync.py	83.90% <100.00%> (ø)

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