Add tests vs Matlab

[JeffFessler]

No description provided.

[codecov]

Codecov Report

Merging #15 (71f8264) into main (7da2332) will not change coverage.
The diff coverage is 100.00%.

❗ Current head 71f8264 differs from pull request most recent head 7f7260c. Consider uploading reports for the commit 7f7260c to get more accurate results

@@            Coverage Diff            @@
##              main       #15   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            7         7           
  Lines          141       141           
=========================================
  Hits           141       141           

Impacted Files	Coverage Δ
src/hann.jl	100.00% <100.00%> (ø)
src/phase_vocoder.jl	100.00% <100.00%> (ø)

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