FIx Tests

[adelavega]

Due to many upgrades (in particular Librosa), many tests are failing due to slightly different values.

I'm relaxing many tests to prevent this from happening so frequently.

NLTK also requires more granular resource management now.

[codecov-commenter]

Codecov Report

Base: 75.89% // Head: 75.64% // Decreases project coverage by -0.25% ⚠️

Coverage data is based on head (6e35af0) compared to base (32e41e1).
Patch coverage: 52.94% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #477      +/-   ##
==========================================
- Coverage   75.89%   75.64%   -0.26%     
==========================================
  Files          65       65              
  Lines        3854     3876      +22     
==========================================
+ Hits         2925     2932       +7     
- Misses        929      944      +15     

Impacted Files	Coverage Δ
pliers/extractors/__init__.py	100.00% <ø> (ø)
pliers/extractors/api/__init__.py	100.00% <ø> (ø)
pliers/extractors/api/microsoft.py	33.33% <ø> (-1.12%)	⬇️
pliers/extractors/text.py	96.28% <40.00%> (-0.72%)	⬇️
pliers/stimuli/text.py	86.82% <40.00%> (-1.98%)	⬇️
pliers/filters/text.py	89.21% <52.38%> (-9.61%)	⬇️
pliers/extractors/models.py	93.93% <100.00%> (ø)

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[adelavega]

Hallelujah!