Averaging slight adjustement for ensured thread safety

[nbollis]

In theory, the previous code was thread safe. However, additional steps were taken to ensure thread safety.

• Import System.Collections.Concurrent for concurrent collections.
• Change averagedPeaks from List to ConcurrentBag for thread safety.
• Move binIncidences array creation outside parallel loop to avoid redundancy.
• Modify Parallel.ForEach loop to use array length instead of list count.
• Remove lock around averagedPeaks.Add as ConcurrentBag is thread-safe.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.21%. Comparing base (6411360) to head (094da3d).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #810      +/-   ##
==========================================
- Coverage   77.21%   77.21%   -0.01%     
==========================================
  Files         218      218              
  Lines       32966    32961       -5     
  Branches     3413     3412       -1     
==========================================
- Hits        25455    25450       -5     
  Misses       6944     6944              
  Partials      567      567              

Files with missing lines	Coverage Δ
...b/SpectralAveraging/Algorithms/SpectraAveraging.cs	98.52% <100.00%> (-0.11%)	⬇️