Add plot functions

[pmav99]

No description provided.

[codecov-commenter]

Codecov Report

Merging #83 (7b460ce) into master (3dcc1b4) will decrease coverage by 3.46%.
Report is 7 commits behind head on master.
The diff coverage is 48.27%.

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@@            Coverage Diff             @@
##           master      #83      +/-   ##
==========================================
- Coverage   62.42%   58.96%   -3.46%     
==========================================
  Files           3        5       +2     
  Lines         346      407      +61     
  Branches       36       37       +1     
==========================================
+ Hits          216      240      +24     
- Misses        115      155      +40     
+ Partials       15       12       -3     

Files	Coverage Δ
thalassa/__init__.py	100.00% <100.00%> (ø)
thalassa/api.py	58.86% <100.00%> (+1.24%)	⬆️
thalassa/normalization.py	63.85% <100.00%> (+0.89%)	⬆️
thalassa/utils.py	63.56% <38.09%> (-4.86%)	⬇️
thalassa/plotting.py	30.43% <30.43%> (ø)