[fix] Plotting Events Components

[SimonWittner]

🔬 Background

• Including Pytest for [fix] fix ValueError when plotting events components #1368

🔮 Key changes

• Pytest

📋 Review Checklist

• I have performed a self-review of my own code.
• I have commented my code, added docstrings and data types to function definitions.
• I have added pytests to check whether my feature / fix works.

Please make sure to follow our best practices in the Contributing guidelines.

[codecov]

Codecov Report

Merging #1420 (ef6cd44) into main (56d9910) will increase coverage by 0.04%.
Report is 1 commits behind head on main.
The diff coverage is 88.46%.

@@            Coverage Diff             @@
##             main    #1420      +/-   ##
==========================================
+ Coverage   89.88%   89.92%   +0.04%     
==========================================
  Files          38       38              
  Lines        5071     5073       +2     
==========================================
+ Hits         4558     4562       +4     
+ Misses        513      511       -2     

Files Changed	Coverage Δ
neuralprophet/plot_utils.py	88.80% <88.46%> (+0.83%)	⬆️

[SimonWittner]

Fixed with #1434