refactor: remove aenum

[iomz]

Replace aenum with the enum in the standard library.

[codecov[bot]]

Codecov Report

Merging #14 (0561a84) into main (efdbf5f) will increase coverage by 5.41%. The diff coverage is 87.50%.

@@            Coverage Diff             @@
##             main      #14      +/-   ##
==========================================
+ Coverage   59.14%   64.55%   +5.41%     
==========================================
  Files           9       10       +1     
  Lines         629      663      +34     
  Branches       53       54       +1     
==========================================
+ Hits          372      428      +56     
+ Misses        253      231      -22     
  Partials        4        4              

Impacted Files	Coverage Δ
myo/__init__.py	100.00% <ø> (ø)
myo/client.py	26.22% <0.00%> (+2.60%)	:arrow_up:
tests/test_myo/test_client.py	72.22% <72.22%> (ø)
myo/constants.py	100.00% <100.00%> (ø)
myo/profile.py	100.00% <100.00%> (ø)
myo/types.py	86.24% <100.00%> (+12.16%)	:arrow_up:
tests/test_myo/test_types.py	100.00% <100.00%> (ø)